“The reasonable man adapts himself to the world: the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.”

“[Man] progresses in all things by resolutely making a fool of himself.”

“A man learns to skate by staggering about and making a fool of himself. Indeed he progresses in all things by resolutely making a fool of himself.”

“The man who writes about himself and his own time is the only man who writes about all people and all time.”

“It is easy - terribly easy - to shake a man's faith in himself. To take advantage of that to break a man's spirit is devil's work.”

“A pessimist is a man who thinks everybody is as nasty as himself, and hates them for it.”

“The most tragic thing in the world is a man of genius who is not a man of honor.”