…there exists today the beginning of a science which claims to possess a systematic method for such a clarification in meaning, and that is the phenomenology founded by Husserl. Here clarification of meaning consists in focussing more sharply on the concepts concerned by directing our attention in a certain way, namely, onto our own acts in the use of these concepts, onto our powers in carrying out our acts, etc. But one must keep in mind that this phenomenology is not a science in the same sense as other sciences. Rather it is (or in any case should be) a procedure or technique that should produce in us a new state of consciousness in which we describe in detail the basic concepts we use in our thought, or grasp other basic concepts hitherto unknown to us. I believe there is no reason at all to reject such a procedure at the outset as hopeless…not only is there no reason for the rejection (of phenomenology), but on the contrary one can present reasons in its favor.
-- Collected Works. III: Unpublished essays and lectures. S. Feferman, J. Dawson, S. Kleene, G. Moore, R. Solovay, and J. van Heijenoort (eds.), Oxford: Oxford University Press.