In the course of Heidegger's philosophical development we find a recurrent engagement with Schelling's ideas, to which he devoted a number of lectures and seminars. Of central concern to him was Schelling's APhilosophical Investigations into the Nature of Human Freedom and Related SubjectsA (= AOf Human FreedomA). The present edition combines the script of the 1936 lecture with an annex containing pertinent extracts from the 1941 lecture and selected seminar notes from subsequent years. For this second edition the text has been carefully emended, printing errors excised and deviations from the original manuscript corrected.