"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."

"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."

"The future is a boot smashing a human face forever."

"Liberty is the right to choose. Freedom is the result of the right choice."

"When you can think of yesterday without regret and tomorrow without fear, you are near contentment."

"Sometimes the only sense we can make out of life is a sense of humor."

"My wife says I never listen to her. At least I think that's what she said."

"Canada: A few acres of snow."