"I am the only guinea pig I have."

"I think I am a verb."

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

"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"Either war is obsolete or men are."

"Dare to be naive."

"Death is impatient and thoughtless. It barges into your room when you are right in the middle of something, and it doesn't bother to wipe its boots."

"The greatest virtues are those which are most useful to other persons."

"We might make mistakes but we will make other things too."

"I have loved like a child collecting shells along the shore line, discarding one shell for another of seemingly more outward beauty with no knowledge of the pearls that were hidden within."

"I saw that all things I feared, and which feared me, had nothing good or bad in them save insofar as the mind was affected by them."

"Most of our future lies ahead."