GA 18


Grundbegriffe der aristotelischen Philosophie

Basic Concepts of Aristotelian Philosophy

In his lecture course from the Summer Semester 1924, Heidegger provides an important account of the roots and implications of Aristotle’s philosophy for the development of phenomenology. Heidegger devotes considerable attention to examining Aristotle’s Rhetoric.


These lectures demonstrate how closely Heidegger’s efforts to express Aristotle’s thinking in German merge into the conceptual apparatus of existential ontology. Heidegger interprets Aristotle’s basic concepts by returning to concrete human existence, its being-in-the-world and ability to speak with its world. He plumbs Aristotle’s Rhetoric, Nicomachean Ethics, and—to a lesser extent— his Politics, Metaphysics, and De anima for accounts of these and other themes (e.g. the good, belief, ἦθος, ψυχή, πάθος, fear, and ἕξις). The concluding part focuses on a theme “of fundamental significance for the entire ontology” (328), Aristotle’s investigation of motion (κίνησις) in terms of ἐντελέχεια, ἐνέργεια, στέρεσις, δύναμις, ποίησις, and παθησις.