In our preceding discussion, we have taken a decisive step. In a lecture course, everything depends on such steps. Occasional questions that have been submitted to me regarding the lectures have betrayed over and over again that most of the listeners are listening in the wrong direction and getting stuck in the details. Of course, the overall context is important even in lectures on the special sciences. But for the sciences the overall context is immediately determined by the object, which for the sciences is always given in advance in some way. In contrast, it is not just that the object of philosophy does not lie at hand, but philosophy has no object at all. Philosophy is a happening that must at all times work out Being for itself anew (that is, Being in its openness, which belongs to it). Only in this happening does philosophical truth open up.
– Heidegger, Introduction to Metaphysics (tr. Fried and Polt)