And today? The age of phenomenological philosophy seems to be over. It is already taken as something past which is only recorded historically along with other schools of philosophy. But in what is most its own phenomenology is not a school. It is the possiblity of thinking, at times changing and only thus persisting, of corresponding to the claim of what is to be thought. If phenomenology is thus experienced and retained, it can disappear as a designation in favor of the matter of thinking whose manifestness remains a mystery.
Supplement 1969
In the sense of the last sentence, on can already read in Being and Time (1927) pp. 62-63: "its (phenomenology's) essential character does not consist in being actual as a philosophical school. Higher than actuality stands possibility. The comprehension of phenomenology consists solely in grasping it as possibility."