Man's mind is his basic tool of survival. Life is given to him,
survival is not. His body is given to him, its sustenance is not.
His mind is given to him, its content is not. To remain alive, he
must act, and before he can act he must know the nature and
purpose of his action...To remain alive, he must think.
-John Galt, Atlas Shrugged-
(I have to admit Dagny is not exactly as I pictured her. But still good.)