Martin Buber, Eclipse of God, 1952 version, p. 56

Philosophy is entitled however to proclaim and to promise the highest reward that is necessary abstraction a looking upward–no longer a looking here — at the objects of true vision, the “ideas.” This conception, prepared for by the Indian teaching of the freeing of the knower from the world of experience, is first fully developed by the Greeks. The Greeks established the hegemony of the sense of sight over the other senses, thus making the optical world into the world, into which the data of the other senses are now to be entered. Correspondingly, they also gave to philosophizing , which for the Indian was still only a bold attempt to catch hole of one’s self, an optical character, that is, the character of contemplation of particular objects. The history of Greek philosophy is that of an opticizing of thought, fully clarified in Plati and perfected in Plotinus. The object of this visual thought is the universal as existence or as a reality higher than existence. Philosophy is grounded on the presupposition that one sees the absolute in universals.