"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."

"God is a verb."

"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."

"What is written without effort is in general read without pleasure."

"Few men during their lifetime come anywhere near exhausting the resources dwelling in them. There are deep wells of strength that are never used."

"Why pay a dollar for a bookmark? Why not use the dollar for a bookmark?"

"He of whom many are afraid ought to fear many."

"The ultimate result of shielding men from the effects of folly is to fill the world with fools."

"See, the problem is that God gives men a brain and a penis, and only enough blood to run one at a time."