In making the condition for its own possibility its deepest concern, philosophy is necessarily about itself_it is autobiographical. The first part of The Autobiography of Philosophy interprets Heidegger's Being and Time, Nietzsche's On the Genealogy of Morals, Aristotle's Metaphysics, and Plato's Lysis as examples of the implicitly autobiographical character of philosophy. The second part is a reading of Rousseau's The Reveries of the Solitary Walker.