If we are to survive, we must have ideas, vision, and courage. These things are rarely produced by committees. Everything that matters in our intellectual and moral life begins with an individual confronting his own mind and conscience in a room by himself. – Arthur M. Schlesinger, Jr.

The paradox of courage is that a man must be a little careless of his life even in order to keep it. – Gilbert K. Chesterton

Perfect courage is to do without witnesses what one would be capable of doing with the world looking on. – Francois de La Rochefoucauld

The enchanting charms of this sublime science reveal only to those who have the courage to go deeply into it. – Carl Friedrich Gauss