"Man is the only animal that deals in that atrocity of atrocities, War. He is the only one that gathers his brethren about him and goes forth in cold blood and with calm pulse to exterminate his kind."

"I can live for two months on a good compliment."

"The commonest superstition is that some people are more superstitious than others."

"I am quite sure now that often, very often, in matters concerning religion and politics a man's reasoning powers are not above the monkey's."

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first."