Aristotle's Rhetoric17 are still useful although they are already taken over in different ways by other lecture-courses.
What is more significant in the future than these groping attempts is grasping the philosophy of Aristotle out of the positioning of the guiding question ('What are beings?') and from within the crossing to the positioning of the grounding-question ('How does the truth of be-ing sway?') as the first termination of the first beginning of Occidental philosophy, that is, grasping Aristotle's philosophy in purely Greek terms, free and detached from all Christianization and Scholasticism, and all the old and new humanism.
In all the lecture-courses, the occasional remarks about contemporary circumstances are factually without relevance. A debate with the contemporary philosophical erudition is not intended anywhere. Occasional references are mostly responses to the queries from the audience.
Most important for understanding the unfolding of the question since Sein und Zeit are the lecture-courses from 1930/31 (Hegels Phänomenologie des Geistes)18 to the lecture-courses on Nietzsche.19 Because of the demands of the Rectorate, the lecture-course of the summer semester of 193320 is inadequate.
The Lectures
These lectures, also, grew entirely out of the work's path and bear its thrust. In preparing the lectures certain issues are not fully evaluated, although they are important for the inquiry. Even if these lectures are published later on they do not come too late.
17 Grundbegriffe der aristotelischen Philosophie, lecture-course of summer semester 1924 delivered in Marburg, ed. Mark Michalski (Frankfurt am Main: 2002), GA 18.
18 Hegels Phänomenologie des Geistes, lecture-course of winter semester 1930/31 delivered in Freiburg, ed. Ingtraud Görland (Frankfurt am Main: 1980), GA 32.
19 Nietzsche: Der Wille zur Macht als Kunst, lecture-course of winter semester 1936/37 delivered in Freiburg, ed. Bernd Heimbüchel (Frankfurt am Main: 1985), GA 43; Nietzsches metaphysische Grundstellung im abendländischen Denken: Die ewige Wiederkehr des Gleichen, lecture-course of summer semester 1937 delivered in Freiburg, ed. Marion Heinz (Frankfurt am Main: 1986), GA 44.
20 Die Grundfrage der Philosophie, lecture-course of summer semester 1933 delivered in Freiburg. See Sein und Wahrheit, ed. Hartmut Tietjen (Frankfurt am main: 2001), GA 36/37.