I suppose every old scholar has had the experience of reading something in a book which was significant to him, but which he could never find again. Sure he is that he read it there, but no one else ever read it, nor can he find it again, though he buy the book and ransack every page.
Ralph Waldo EmersonWe do not yet trust the unknown powers of thought. Whence came all these tools, inventions, book laws, parties, kingdoms? Out of the invisible world, through a few brains. The arts and institutions of men are created out of thought. The powers that make the capitalist are metaphysical, the force of method and force of will makes trade, and builds towns.
Ralph Waldo Emerson