The real tragedy of life is when men are afraid of the light.

Your dog is your only philosopher.

It is our duty to select the best and most dependable theory that human intelligence can supply, and use it as a raft to ride the seas of life.

True opinions are a fine thing and do all sorts of good so long as they stay in their place; but they will not stay long. They run away from a man's mind, so they are not worth much until you tether them by working out the reason. Once they are tied down, they become knowledge, and are stable.

Wealth does not bring excellence, but that wealth comes from excellence.

Mathematics is like draughts in being suitable for the young, not too difficult, amusing, and without peril to the state.

To fear death, gentlemen, is no other then to think oneself wise when one is not, to think one knows what one does not know.