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

"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."

"Either war is obsolete or men are."

"You can do no great things, just small things with great love."

"You never can see into someone else's marriage."

"When one door of happiness closes, another one opens, but often we look so long at the closed door that we do not see the one that has been opened to us."

"It's a sure sign of summer if the chair gets up when you do."

"Eventually, alas, I realized the main purpose of buying cocaine is to run out of it."

"If you can find a path with no obstacles, it probably doesn't lead anywhere."