EN
The history of philosophy is an essential element of Heidegger's philosophy. The paper raises the question: Could Heidegger have successfully completed his 'Being and time' as he proclaimed in its first edition? In the author's view, the fact that the second part of the book remained unwritten was an inevitable consequence of the turn: The question of being in the second part of 'Being and time' remained unresolved, therefore Heidegger later focused on the understanding of being in Hegel, Leibniz, Heraclites and Parmenides. The author argues, however, that even this important re-orientation could not lead to a successful accomplishment of Heidegger's original intention. i.e. to conceive being without existence, what would have enabled him to pass on from the metaphysics of existence to the metaphysics of being.