"Racism, pollution and the rest of it are themselves very close to extinction."

"I am the only guinea pig I have."

"Sometimes I think we're alone. Sometimes I think we're not. In either case, the thought is staggering."

"When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong."

"Dare to be naive."

"Now there is one outstandingly important fact regarding Spaceship Earth, and that is that no instruction book came with it."

"Friend, be not afraid of thy office, thou sendest me to God."

"All men's misfortunes spring from their hatred of being alone."

"I have the true feeling of myself only when I am unbearably unhappy."

"Sin has many tools, but a lie is the handle which fits them all."

"Nietzche started a nonsensical idea that men had once sought as good what we now call evil; if it were so, we could not talk of surpassing or even falling short of them."

"All governments eventually lean further and further towards aristocracy."