"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."

"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"Either war is obsolete or men are."

"Humanity is acquiring all the right technology for all the wrong reasons."

"Dare to be naive."

"A single event can shape our lives or change the course of history."

"Never fear the want of business. A man who qualifies himself well for his calling, never fails of employment."

"The consumer's side of the coffin lid is never ostentatious."

"Wisdom does not show itself so much in precept as in life - in firmness of mind and a mastery of appetite. It teaches us to do as well as to talk; and to make our words and actions all of a color."

"Loss is nothing else but change, and change is Nature's delight."

"How far that little candle throws his beams! So shines a good deed in a weary world."