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

"I think I am a verb."

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

"Nature is trying very hard to make us succeed, but nature does not depend on us. We are not the only experiment."

"Humanity is acquiring all the right technology for all the wrong reasons."

"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."

"A lifetime of happiness! No man alive could bear it: it would be hell on earth."

"Not eating meat is a decision, eating meat is an instinct."

"There is nothing so asinine that governments will not proclaim it as official doctrine."

"To be possessed is an admirable reason for possessing."

"Genius without education is like silver in the mine."

"A prudent mind can see room for misgiving, lest he who prospers would one day suffer reverse."