"That well-known voice speaks in all languages, governs all men, and none ever caught a glimpse of its form. If the man will exactly obey it, it will adopt him, so that he shall not any longer separate it from himself in his thought; he shall seem to be it, he shall be it. If he listens with insatiable ears, richer and greater wisdom is taught him; the sound swells to a ravishing music, his is borne away as with a flood, he becomes careless of his food and of his house, he is the fool of ideas, and leads a heavenly life. But if his eye is set on the things to be done, and not on the truth that is still taught, and for the sake of which the things are to be done, then the voice grows faint, and at last is but a humming in his ears. His health and greatness consist in his being the channel through which heaven flows to earth.
-Ralph Waldo Emerson, Emerson on Man and God