"I never think of the future. It comes soon enough."
"As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality."
"How I wish that somewhere there existed an island for those who are wise and of good will."
"Man usually avoids attributing cleverness to somebody else -- unless it is an enemy."
"If I had only known, I would have been a locksmith."
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
"There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle."
"A man's ethical behavior should be based effectually on sympathy, education, and social ties; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death."
"Problems cannot be solved at the same level of awareness that created them."
"Common sense is the collection of prejudices acquired by age eighteen."
"All of us who are concerned for peace and triumph of reason and justice must be keenly aware how small an influence reason and honest good will exert upon events in the political field."
"It is the theory that decides what we can observe."
"The secret to creativity is knowing how to hide your sources."
"It has become appallingly obvious that our technology has exceeded our humanity."
"The most beautiful thing we can experience is the mysterious.He to whom this emotion is a stranger,who can no longer wonder and stand rapt in awe,is as good as dead:his eyes are closed."
"Never do anything against conscience even if the state demands it."
"When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity."
"It is only to the individual that a soul is given."
"If the facts don't fit the theory, change the facts."
"I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones."
"Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence."
"The hardest thing in the world to understand is the income tax."
"The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth. To make a goal of comfort or happiness has never appealed to me; a system of ethics built on this basis would be sufficient only for a herd of cattle."
"I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."
"If we knew what it was we were doing, it would not be called research, would it?"