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"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."

"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."

"Dare to be naive."

"Now there is one outstandingly important fact regarding Spaceship Earth, and that is that no instruction book came with it."

"Talent, lying in the understanding, is often inherited; genius, being the action of reason or imagination, rarely or never."

"You give little when you give of your possessions. It is when you give of yourself that you truly give."

"American youth attributes much more importance to arriving at driver's license age than at voting age."

"My wife and I were happy for twenty years. Then we met."

"A likely impossibility is always preferable to an unconvincing possibility."

"Conspicuous consumption of valuable goods is a means of reputability to the gentleman of leisure."