The hidden teaching starts and finishes with experience. Every man must begin his mental life as a seeker by noting the fact that he is conscious of an external environment. He will proceed in time to discover that it is an ordered one, that Nature is the manifestation of an orderly Mind. He discovers in the end that consciousness of this Mind becomes the profoundest fact of his internal experience.
-- Notebooks Category 20: What Is Philosophy? > Chapter 4: Its Realization Beyond Ecstasy > # 132
-- Perspectives > Chapter 20: What Is Philosophy? > # 14