Session 7 Ponderings III, 115-130 

Place: Zoom 

Dates: Friday October 3, 10, 17, 24, and 31 and November 7, 14, and 21, 2025 

Time: 17.00-19.00 (CET). 

Fee: 100 Euro, 80 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. 

Many people have heard or read about Martin Heidegger’s so-called Black Notebooks but few have studied them. This is the first of a series of webinars on the notebooks. After a short introduction we will works our way through them and use the following themes as our guideline: philosophy, university and politics, religion and theology, thinking and poetry, autobiography, human being and Dasein and Being and beings. 

Literature: 

Martin Heidegger, Ponderings II-VI, Indiana 2016. 

Martin Heidegger, Überlegungen II-VI (GA 94), Frankfurt am Main 2014 

Session Seven: The Essence of Truth, 148-170 

 Place: Zoom 

Fee: 80 Euro, 60 Euro for patrons, and 40 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Literature: 

Martin Heidegger, The Essence of Truth. On Plato's Cave Allegory and Theaetetus, London 2002. 

Martin Heidegger, Vom Wesen der Wahrheit. Zu Platons Höhlengleichnis und Theätet (GA 34), Frankfurt am Main 1988. 

From the editor´s afterword (GA 34, 333): This text reproduces the text of the first lecture, which was given for two hours under the title “On the Essence of Truth” in the winter semester of 1931/32 at the University of Freiburg. It began on October 27, 1931, and ended on February 26, 1932. The lecture was preceded by a lecture of the same title, written in 1930 and delivered several times, which appeared in print in 1943 and has also been available in “Wegmarken” since 1967 (now GA Vol. 9, pp. 177-202). The topic was taken up again in a modified form and with a new, more detailed introduction in the lecture of the winter semester of 1933/34, which will be published in Volumes 36/37 of the Complete Works. The line of thought in the text “Plato's Doctrine of Truth” (GA Vol. 9, pp. 203-238), which was developed in 1940 and first published in 1942 in the yearbook "Spiritual Tradition" and then in 1947 together with the “Letter on Humanism” (GA Vol. 9, pp. 203-238), also goes back to the lecture given in the winter semester of 1931/32 (not 1930/31, ibid. p. 483), but is limited to the Allegory of the Cave. To highlight these connections, the text of the lecture now presented appears with the subtitle “On Plato's Allegory of the Cave and Theaetetus.” The logic lecture of the Marburg winter semester 1925/26, which received the subtitle “The Question of Truth” in the complete works (GA 21), briefly referred (p. 168 f.) to Plato's significance for the history of the concept of truth, but dealt more extensively with Aristotle, Hegel, and Kant. The first interpretations of the Allegory of the Cave and the "Theaetetus,” proceeding differently than the later ones, were presented in the summer semester of 1926 in the lecture “Fundamental Concepts of Ancient Philosophy” GA 22); cf. 1927 “The Basic Problems of Phenomenology” (GA 24, pp. 400-405). 

Lecture and Reading Session VIII: Lecture 8 

Lecture and Reading Session IX: Lecture 9 

Lecture and Reading Session X: Lecture 10 

Place: Zoom 

Time: 19.00-21.00 CET 

Dates: Monday, October 6, 13, 20, and 27, and November 3, 10, 17, and 24, and December 1, and 8, 2025. 

Fee: Full course 120 Euro; Patrons 80 Euros; Students and low income 60 Euros. Participants can obtain a certificate of participation. 

Literature: 

Martin Heidegger, What is called thinking? Translated by John Macquarrie & Edward Robinson. London, Blackwell. First English Edition 1962, 2001. 

Martin Heidegger, Was heißt Denken?, Text der durchgesehenen Einzelausgabe (Max Niemeyer, Tübingen, 1954) mit Randbemerkungen des Autors aus seinem Handexemplar. Herausgegeben von Paola-Ludovika Coriando (Gesamtausgabe Band 8), Frankfurt am Main. 2002 

Session Two: Heidegger, Phenomenology of Intuition and Expression, 14-27

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Session Six: The fundamental metaphysical position of Leibniz: Reading webinar 2

Dates: October 14, 21, and 28, November 4, 11, 18, 22 and 25, December 2, and 9, 2025

Place: Zoom

Time: 19.00 – 21.00 (CET)

Participation fee: 120 Euro, Patrons 95 Euro, Students 60 Euro. Participants can receive a certificate of participation. You can join the first session for free.

For more information and registration: alfred.denker@yahoo.com

The goal of this lecture course is to offer an introduction to Heidegger’s history of metaphysics. In each session, I will give an overview of the fundamental metaphysical position of the philosopher in question. The course is meant both as an introduction to the history of philosophy and an introduction to Heidegger’s understanding of the history of metaphysics.

Literature: The lectures and the selected texts will be made available as PDFs.

Session Four: Contributions, Preview, 39-56 

 Place: Zoom 

Dates: Wednesday October 29, November 5, 12, 19, and 28, December 3, 10, and 17, 2025 and January 7, 14, 21, and 28, and February 4, 11, 18, and 25, 2026 

Time: 17.00-19.00 (CET). 

Fee: 150 Euro, 120 Euro for patrons, and 75 Euro for students and low income. Participants can receive a certificate of participation. 

This webinar is dedicated to Heidegger՚s second main work Contributions to Philosophy. On Enowning. The large manuscript was published posthumously because it could only be understood after his lecture courses would have been digested. It is the turning point from the existential analytic of Dasein, Fundamental Ontology, and Metaphysics into Being-historical Thinking, and his work after 1945. Since it is an attempt to think in a non-metaphysical language, the book is notoriously difficult to understand. This is the first of two webinars that will take on the challenge of making sense of the Contributions to Philosophy. 

Literature: 

Martin Heidegger, Contributions to Philosophy, Indiana 2016, 3-203. 

Martin Heidegger, Beiträge zur Philosophie (GA 65), Frankfurt am Main 1989 

Session Eight: The Essence of Truth, 171-193 

 Place: Zoom 

Fee: 80 Euro, 60 Euro for patrons, and 40 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Literature: 

Martin Heidegger, The Essence of Truth. On Plato's Cave Allegory and Theaetetus, London 2002. 

Martin Heidegger, Vom Wesen der Wahrheit. Zu Platons Höhlengleichnis und Theätet (GA 34), Frankfurt am Main 1988. 

From the editor´s afterword (GA 34, 333): This text reproduces the text of the first lecture, which was given for two hours under the title “On the Essence of Truth” in the winter semester of 1931/32 at the University of Freiburg. It began on October 27, 1931, and ended on February 26, 1932. The lecture was preceded by a lecture of the same title, written in 1930 and delivered several times, which appeared in print in 1943 and has also been available in “Wegmarken” since 1967 (now GA Vol. 9, pp. 177-202). The topic was taken up again in a modified form and with a new, more detailed introduction in the lecture of the winter semester of 1933/34, which will be published in Volumes 36/37 of the Complete Works. The line of thought in the text “Plato's Doctrine of Truth” (GA Vol. 9, pp. 203-238), which was developed in 1940 and first published in 1942 in the yearbook "Spiritual Tradition" and then in 1947 together with the “Letter on Humanism” (GA Vol. 9, pp. 203-238), also goes back to the lecture given in the winter semester of 1931/32 (not 1930/31, ibid. p. 483), but is limited to the Allegory of the Cave. To highlight these connections, the text of the lecture now presented appears with the subtitle “On Plato's Allegory of the Cave and Theaetetus.” The logic lecture of the Marburg winter semester 1925/26, which received the subtitle “The Question of Truth” in the complete works (GA 21), briefly referred (p. 168 f.) to Plato's significance for the history of the concept of truth, but dealt more extensively with Aristotle, Hegel, and Kant. The first interpretations of the Allegory of the Cave and the "Theaetetus,” proceeding differently than the later ones, were presented in the summer semester of 1926 in the lecture “Fundamental Concepts of Ancient Philosophy” GA 22); cf. 1927 “The Basic Problems of Phenomenology” (GA 24, pp. 400-405). 

Session 8 Ponderings III, 131-147 

Place: Zoom 

Dates: Friday October 3, 10, 17, 24, and 31 and November 7, 14, and 21, 2025 

Time: 17.00-19.00 (CET). 

Fee: 100 Euro, 80 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. 

Many people have heard or read about Martin Heidegger’s so-called Black Notebooks but few have studied them. This is the first of a series of webinars on the notebooks. After a short introduction we will works our way through them and use the following themes as our guideline: philosophy, university and politics, religion and theology, thinking and poetry, autobiography, human being and Dasein and Being and beings. 

Literature: 

Martin Heidegger, Ponderings II-VI, Indiana 2016. 

Martin Heidegger, Überlegungen II-VI (GA 94), Frankfurt am Main 2014 

Session Seven: The fundamental metaphysical position of Kant: Lecture 1

Dates: October 14, 21, and 28, November 4, 11, 18, 22 and 25, December 2, and 9, 2025

Place: Zoom

Time: 19.00 – 21.00 (CET)

Participation fee: 120 Euro, Patrons 95 Euro, Students 60 Euro. Participants can receive a certificate of participation. You can join the first session for free.

For more information and registration: alfred.denker@yahoo.com

The goal of this lecture course is to offer an introduction to Heidegger’s history of metaphysics. In each session, I will give an overview of the fundamental metaphysical position of the philosopher in question. The course is meant both as an introduction to the history of philosophy and an introduction to Heidegger’s understanding of the history of metaphysics.

Literature: The lectures and the selected texts will be made available as PDFs.

Lecture and Reading Session VII: Lecture 7 

Place: Zoom 

Time: 19.00-21.00 CET 

Dates: Monday, October 6, 13, 20, and 27, and November 3, 10, 17, and 24, and December 1, and 8, 2025. 

Fee: Full course 120 Euro; Patrons 80 Euros; Students and low income 60 Euros. Participants can obtain a certificate of participation. 

Literature: 

Martin Heidegger, What is called thinking? Translated by John Macquarrie & Edward Robinson. London, Blackwell. First English Edition 1962, 2001. 

Martin Heidegger, Was heißt Denken?, Text der durchgesehenen Einzelausgabe (Max Niemeyer, Tübingen, 1954) mit Randbemerkungen des Autors aus seinem Handexemplar. Herausgegeben von Paola-Ludovika Coriando (Gesamtausgabe Band 8), Frankfurt am Main. 2002 

Session Three: Heidegger, Phenomenology of Intuition and Expression, 28-41

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Session Eight: The fundamental metaphysical position of Spinoza: Lecture

Dates: October 14, 21, and 28, November 4, 11, 18, 22 and 25, December 2, and 9, 2025

Place: Zoom

Time: 19.00 – 21.00 (CET)

Participation fee: 120 Euro, Patrons 95 Euro, Students 60 Euro. Participants can receive a certificate of participation. You can join the first session for free.

For more information and registration: alfred.denker@yahoo.com

The goal of this lecture course is to offer an introduction to Heidegger’s history of metaphysics. In each session, I will give an overview of the fundamental metaphysical position of the philosopher in question. The course is meant both as an introduction to the history of philosophy and an introduction to Heidegger’s understanding of the history of metaphysics.

Literature: The lectures and the selected texts will be made available as PDFs.

Session Five: Contributions, Preview, 57-71 

 Place: Zoom 

Dates: Wednesday October 29, November 5, 12, 19, and 28, December 3, 10, and 17, 2025 and January 7, 14, 21, and 28, and February 4, 11, 18, and 25, 2026 

Time: 17.00-19.00 (CET). 

Fee: 150 Euro, 120 Euro for patrons, and 75 Euro for students and low income. Participants can receive a certificate of participation. 

This webinar is dedicated to Heidegger՚s second main work Contributions to Philosophy. On Enowning. The large manuscript was published posthumously because it could only be understood after his lecture courses would have been digested. It is the turning point from the existential analytic of Dasein, Fundamental Ontology, and Metaphysics into Being-historical Thinking, and his work after 1945. Since it is an attempt to think in a non-metaphysical language, the book is notoriously difficult to understand. This is the first of two webinars that will take on the challenge of making sense of the Contributions to Philosophy. 

Literature: 

Martin Heidegger, Contributions to Philosophy, Indiana 2016, 3-203. 

Martin Heidegger, Beiträge zur Philosophie (GA 65), Frankfurt am Main 1989 

Session Nine: The Essence of Truth, 194-215 

 Place: Zoom 

Dates: Friday October 3, 10, 17, 24, and 31 and November 7, 14, and 21, 2025 

Time: 17.00-19.00 (CET). 

Fee: 80 Euro, 60 Euro for patrons, and 40 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Literature: 

Martin Heidegger, The Essence of Truth. On Plato's Cave Allegory and Theaetetus, London 2002. 

Martin Heidegger, Vom Wesen der Wahrheit. Zu Platons Höhlengleichnis und Theätet (GA 34), Frankfurt am Main 1988. 

From the editor´s afterword (GA 34, 333): This text reproduces the text of the first lecture, which was given for two hours under the title “On the Essence of Truth” in the winter semester of 1931/32 at the University of Freiburg. It began on October 27, 1931, and ended on February 26, 1932. The lecture was preceded by a lecture of the same title, written in 1930 and delivered several times, which appeared in print in 1943 and has also been available in “Wegmarken” since 1967 (now GA Vol. 9, pp. 177-202). The topic was taken up again in a modified form and with a new, more detailed introduction in the lecture of the winter semester of 1933/34, which will be published in Volumes 36/37 of the Complete Works. The line of thought in the text “Plato's Doctrine of Truth” (GA Vol. 9, pp. 203-238), which was developed in 1940 and first published in 1942 in the yearbook "Spiritual Tradition" and then in 1947 together with the “Letter on Humanism” (GA Vol. 9, pp. 203-238), also goes back to the lecture given in the winter semester of 1931/32 (not 1930/31, ibid. p. 483), but is limited to the Allegory of the Cave. To highlight these connections, the text of the lecture now presented appears with the subtitle “On Plato's Allegory of the Cave and Theaetetus.” The logic lecture of the Marburg winter semester 1925/26, which received the subtitle “The Question of Truth” in the complete works (GA 21), briefly referred (p. 168 f.) to Plato's significance for the history of the concept of truth, but dealt more extensively with Aristotle, Hegel, and Kant. The first interpretations of the Allegory of the Cave and the "Theaetetus,” proceeding differently than the later ones, were presented in the summer semester of 1926 in the lecture “Fundamental Concepts of Ancient Philosophy” GA 22); cf. 1927 “The Basic Problems of Phenomenology” (GA 24, pp. 400-405). 

Session Nine: Heidegger, Phenomenology of Intuition and Expression, 112-122 

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Lecture and Reading Session IX: Lecture 9 

Place: Zoom 

Time: 19.00-21.00 CET 

Dates: Monday, October 6, 13, 20, and 27, and November 3, 10, 17, and 24, and December 1, and 8, 2025. 

Fee: Full course 120 Euro; Patrons 80 Euros; Students and low income 60 Euros. Participants can obtain a certificate of participation. 

Literature: 

Martin Heidegger, What is called thinking? Translated by John Macquarrie & Edward Robinson. London, Blackwell. First English Edition 1962, 2001. 

Martin Heidegger, Was heißt Denken?, Text der durchgesehenen Einzelausgabe (Max Niemeyer, Tübingen, 1954) mit Randbemerkungen des Autors aus seinem Handexemplar. Herausgegeben von Paola-Ludovika Coriando (Gesamtausgabe Band 8), Frankfurt am Main. 2002 

Session Nine: The fundamental metaphysical position of Kant: Reading webinar 1

Dates: October 14, 21, and 28, November 4, 11, 18, 22 and 25, December 2, and 9, 2025

Place: Zoom

Time: 19.00 – 21.00 (CET)

Participation fee: 120 Euro, Patrons 95 Euro, Students 60 Euro. Participants can receive a certificate of participation. You can join the first session for free.

For more information and registration: alfred.denker@yahoo.com

The goal of this lecture course is to offer an introduction to Heidegger’s history of metaphysics. In each session, I will give an overview of the fundamental metaphysical position of the philosopher in question. The course is meant both as an introduction to the history of philosophy and an introduction to Heidegger’s understanding of the history of metaphysics.

Literature: The lectures and the selected texts will be made available as PDFs.

Session Six: Contributions, Echo, 75-88  Place: Zoom 

Dates: Wednesday October 29, November 5, 12, 19, and 28, December 3, 10, and 17, 2025 and January 7, 14, 21, and 28, and February 4, 11, 18, and 25, 2026 

Time: 17.00-19.00 (CET). 

Fee: 150 Euro, 120 Euro for patrons, and 75 Euro for students and low income. Participants can receive a certificate of participation. 

This webinar is dedicated to Heidegger՚s second main work Contributions to Philosophy. On Enowning. The large manuscript was published posthumously because it could only be understood after his lecture courses would have been digested. It is the turning point from the existential analytic of Dasein, Fundamental Ontology, and Metaphysics into Being-historical Thinking, and his work after 1945. Since it is an attempt to think in a non-metaphysical language, the book is notoriously difficult to understand. This is the first of two webinars that will take on the challenge of making sense of the Contributions to Philosophy. 

Literature: 

Martin Heidegger, Contributions to Philosophy, Indiana 2016, 3-203. 

Martin Heidegger, Beiträge zur Philosophie (GA 65), Frankfurt am Main 1989 

Session Four: Heidegger, Phenomenology of Intuition and Expression, 42-55

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Session Ten: The Essence of Truth, 215-229 

 Place: Zoom 

Fee: 80 Euro, 60 Euro for patrons, and 40 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Literature: 

Martin Heidegger, The Essence of Truth. On Plato's Cave Allegory and Theaetetus, London 2002. 

Martin Heidegger, Vom Wesen der Wahrheit. Zu Platons Höhlengleichnis und Theätet (GA 34), Frankfurt am Main 1988. 

From the editor´s afterword (GA 34, 333): This text reproduces the text of the first lecture, which was given for two hours under the title “On the Essence of Truth” in the winter semester of 1931/32 at the University of Freiburg. It began on October 27, 1931, and ended on February 26, 1932. The lecture was preceded by a lecture of the same title, written in 1930 and delivered several times, which appeared in print in 1943 and has also been available in “Wegmarken” since 1967 (now GA Vol. 9, pp. 177-202). The topic was taken up again in a modified form and with a new, more detailed introduction in the lecture of the winter semester of 1933/34, which will be published in Volumes 36/37 of the Complete Works. The line of thought in the text “Plato's Doctrine of Truth” (GA Vol. 9, pp. 203-238), which was developed in 1940 and first published in 1942 in the yearbook "Spiritual Tradition" and then in 1947 together with the “Letter on Humanism” (GA Vol. 9, pp. 203-238), also goes back to the lecture given in the winter semester of 1931/32 (not 1930/31, ibid. p. 483), but is limited to the Allegory of the Cave. To highlight these connections, the text of the lecture now presented appears with the subtitle “On Plato's Allegory of the Cave and Theaetetus.” The logic lecture of the Marburg winter semester 1925/26, which received the subtitle “The Question of Truth” in the complete works (GA 21), briefly referred (p. 168 f.) to Plato's significance for the history of the concept of truth, but dealt more extensively with Aristotle, Hegel, and Kant. The first interpretations of the Allegory of the Cave and the "Theaetetus,” proceeding differently than the later ones, were presented in the summer semester of 1926 in the lecture “Fundamental Concepts of Ancient Philosophy” GA 22); cf. 1927 “The Basic Problems of Phenomenology” (GA 24, pp. 400-405). 

Lecture and Reading Session X: Lecture 10 

Place: Zoom 

Time: 19.00-21.00 CET 

Dates: Monday, October 6, 13, 20, and 27, and November 3, 10, 17, and 24, and December 1, and 8, 2025. 

Fee: Full course 120 Euro; Patrons 80 Euros; Students and low income 60 Euros. Participants can obtain a certificate of participation. 

Literature: 

Martin Heidegger, What is called thinking? Translated by John Macquarrie & Edward Robinson. London, Blackwell. First English Edition 1962, 2001. 

Martin Heidegger, Was heißt Denken?, Text der durchgesehenen Einzelausgabe (Max Niemeyer, Tübingen, 1954) mit Randbemerkungen des Autors aus seinem Handexemplar. Herausgegeben von Paola-Ludovika Coriando (Gesamtausgabe Band 8), Frankfurt am Main. 2002 

Session Ten: The fundamental metaphysical position of Kant: Reading webinar 2

Dates: October 14, 21, and 28, November 4, 11, 18, 22 and 25, December 2, and 9, 2025

Place: Zoom

Time: 19.00 – 21.00 (CET)

Participation fee: 120 Euro, Patrons 95 Euro, Students 60 Euro. Participants can receive a certificate of participation. You can join the first session for free.

For more information and registration: alfred.denker@yahoo.com

The goal of this lecture course is to offer an introduction to Heidegger’s history of metaphysics. In each session, I will give an overview of the fundamental metaphysical position of the philosopher in question. The course is meant both as an introduction to the history of philosophy and an introduction to Heidegger’s understanding of the history of metaphysics.

Literature: The lectures and the selected texts will be made available as PDFs.

Session Seven: Contributions, Echo, 89-102  

 Place: Zoom 

Dates: Wednesday October 29, November 5, 12, 19, and 28, December 3, 10, and 17, 2025 and January 7, 14, 21, and 28, and February 4, 11, 18, and 25, 2026 

Time: 17.00-19.00 (CET). 

Fee: 150 Euro, 120 Euro for patrons, and 75 Euro for students and low income. Participants can receive a certificate of participation. 

This webinar is dedicated to Heidegger՚s second main work Contributions to Philosophy. On Enowning. The large manuscript was published posthumously because it could only be understood after his lecture courses would have been digested. It is the turning point from the existential analytic of Dasein, Fundamental Ontology, and Metaphysics into Being-historical Thinking, and his work after 1945. Since it is an attempt to think in a non-metaphysical language, the book is notoriously difficult to understand. This is the first of two webinars that will take on the challenge of making sense of the Contributions to Philosophy. 

Literature: 

Martin Heidegger, Contributions to Philosophy, Indiana 2016, 3-203. 

Martin Heidegger, Beiträge zur Philosophie (GA 65), Frankfurt am Main 1989 

Session Five: Heidegger, Phenomenology of Intuition and Expression, 56-69

 Place: Zoom 

Dates: Friday October 3, 10, 17, 24, and 31 and November 7, 14, and 21, 2025 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Session Eight: Contributions, Echo,103-115 

 Place: Zoom 

Dates: Wednesday October 29, November 5, 12, 19, and 28, December 3, 10, and 17, 2025 and January 7, 14, 21, and 28, and February 4, 11, 18, and 25, 2026 

Time: 17.00-19.00 (CET). 

Fee: 150 Euro, 120 Euro for patrons, and 75 Euro for students and low income. Participants can receive a certificate of participation. 

This webinar is dedicated to Heidegger՚s second main work Contributions to Philosophy. On Enowning. The large manuscript was published posthumously because it could only be understood after his lecture courses would have been digested. It is the turning point from the existential analytic of Dasein, Fundamental Ontology, and Metaphysics into Being-historical Thinking, and his work after 1945. Since it is an attempt to think in a non-metaphysical language, the book is notoriously difficult to understand. This is the first of two webinars that will take on the challenge of making sense of the Contributions to Philosophy. 

Literature: 

Martin Heidegger, Contributions to Philosophy, Indiana 2016, 3-203. 

Martin Heidegger, Beiträge zur Philosophie (GA 65), Frankfurt am Main 1989 

Session Six: Heidegger, Phenomenology of Intuition and Expression, 70-83

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Session Nine: Contributions, Playing forth, 119-131 

 Place: Zoom 

Dates: Wednesday October 29, November 5, 12, 19, and 28, December 3, 10, and 17, 2025 and January 7, 14, 21, and 28, and February 4, 11, 18, and 25, 2026 

Time: 17.00-19.00 (CET). 

Fee: 150 Euro, 120 Euro for patrons, and 75 Euro for students and low income. Participants can receive a certificate of participation. 

This webinar is dedicated to Heidegger՚s second main work Contributions to Philosophy. On Enowning. The large manuscript was published posthumously because it could only be understood after his lecture courses would have been digested. It is the turning point from the existential analytic of Dasein, Fundamental Ontology, and Metaphysics into Being-historical Thinking, and his work after 1945. Since it is an attempt to think in a non-metaphysical language, the book is notoriously difficult to understand. This is the first of two webinars that will take on the challenge of making sense of the Contributions to Philosophy. 

Literature: 

Martin Heidegger, Contributions to Philosophy, Indiana 2016, 3-203. 

Martin Heidegger, Beiträge zur Philosophie (GA 65), Frankfurt am Main 1989 

Session Seven: Heidegger, Phenomenology of Intuition and Expression, 84-97

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Session Ten: Contributions, Playing forth, 132-144 

 Place: Zoom 

Dates: Wednesday October 29, November 5, 12, 19, and 28, December 3, 10, and 17, 2025 and January 7, 14, 21, and 28, and February 4, 11, 18, and 25, 2026 

Time: 17.00-19.00 (CET). 

Fee: 150 Euro, 120 Euro for patrons, and 75 Euro for students and low income. Participants can receive a certificate of participation. 

This webinar is dedicated to Heidegger՚s second main work Contributions to Philosophy. On Enowning. The large manuscript was published posthumously because it could only be understood after his lecture courses would have been digested. It is the turning point from the existential analytic of Dasein, Fundamental Ontology, and Metaphysics into Being-historical Thinking, and his work after 1945. Since it is an attempt to think in a non-metaphysical language, the book is notoriously difficult to understand. This is the first of two webinars that will take on the challenge of making sense of the Contributions to Philosophy. 

Literature: 

Martin Heidegger, Contributions to Philosophy, Indiana 2016, 3-203. 

Martin Heidegger, Beiträge zur Philosophie (GA 65), Frankfurt am Main 1989 

Session Eight: Heidegger, Phenomenology of Intuition and Expression, 98-111

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Session Eleven: Contributions, Playing forth, 145-157 

 Place: Zoom 

Dates: Wednesday October 29, November 5, 12, 19, and 28, December 3, 10, and 17, 2025 and January 7, 14, 21, and 28, and February 4, 11, 18, and 25, 2026 

Time: 17.00-19.00 (CET). 

Fee: 150 Euro, 120 Euro for patrons, and 75 Euro for students and low income. Participants can receive a certificate of participation. 

This webinar is dedicated to Heidegger՚s second main work Contributions to Philosophy. On Enowning. The large manuscript was published posthumously because it could only be understood after his lecture courses would have been digested. It is the turning point from the existential analytic of Dasein, Fundamental Ontology, and Metaphysics into Being-historical Thinking, and his work after 1945. Since it is an attempt to think in a non-metaphysical language, the book is notoriously difficult to understand. This is the first of two webinars that will take on the challenge of making sense of the Contributions to Philosophy. 

Literature: 

Martin Heidegger, Contributions to Philosophy, Indiana 2016, 3-203. 

Martin Heidegger, Beiträge zur Philosophie (GA 65), Frankfurt am Main 1989 

Session Nine: Heidegger, Phenomenology of Intuition and Expression, 112-122

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting 

Session Ten: Heidegger, Phenomenology of Intuition and Expression, 123-33

 Place: Zoom 

Time: 17.00-19.00 (CET). 

Fee: 120 Euro, 90 Euro for patrons, and 60 Euro for students and low income. Participants can receive a certificate of participation. You can attend the first session for free. 

Course Texts

Martin Heidegger, Phenomenology of Intuition and Expression, London 2010. 

Martin Heidegger, Phänomenologie der Anschauung und des Ausdrucks (GA 59), Frankfurt am Main 1993. 

The importance that Heidegger obviously attached to this lecture course is expressed in the title note “Investigation of the concept of phenomenological philosophy – First Investigation”. It may, of course, be assumed that the all too obvious, however probably originally intended association with Husserl's Logical Investigations was the cause for dropping this relation again. Nevertheless this tentatively noted superordinate title captures very well the intention of the lecture course so that one can really say that this lecture course has a key role. More  intensively than in any of the preceding and following lecture courses the new core of the phenomenological method, namely the phenomenological destruction which in turn leads into a phenomenological judication, is presented and treated upon. 

The retained lecture title is to be understood from the preceding lecture course “Basic Problems of Phenomenology” in which science in general was determined as expression complex of life and phenomenology in particular as origin-science of life per se. The part of the title “Phenomenology of Expression” therefore relates to the particular character of phenomenological concepts, that is to be concepts of expression and not concepts of order. The part of the title “Phenomenology of Intuition” refers in turn to that through which these concepts are formed, namely the phenomenological understanding, which is as understanding of the origin an “intuiting