- "Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
- "Imagination is more important than knowledge."
- "The only real valuable thing is intuition."
- "A person starts to live when he can live outside himself."
- "Weakness of attitude becomes weakness of character."
- "Anyone who has never made a mistake has never tried anything new."
- "Science is a wonderful thing if one does not have to earn one's living at it."
- "The secret to creativity is knowing how to hide your sources."
- "God does not care about our mathematical difficulties. He integrates empirically."
- "The whole of science is nothing more than a refinement of everyday thinking."
- "Peace cannot be kept by force. It can only be achieved by understanding."
- "The most incomprehensible thing about the world is that it is comprehensible."
- "We can't solve problems by using the same kind of thinking we used when we created them."
- "Education is what remains after one has forgotten everything he learned in school."
- "I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones."
- "Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism -- how passionately I hate them!"
- "Yes, we have to divide up our time like that, between our politics and our equations. But to me our equations are far more important, for politics are only a matter of present concern. A mathematical equation stands forever."
- "The release of atom power has changed everything except our way of thinking...the solution to this problem lies in the heart of mankind. If only I had known, I should have become a watchmaker."
- "A man's ethical behavior should be based effectually on sympathy, education, and social ties; no religious basis is necessary. Man would indeeded be in a poor way if he had to be restrained by fear of punishment and hope of reward after death."
- "You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive them there. The only difference is that there is no cat."
- "A human being is a part of a whole, called by us _universe_, a part limited in time and space. He experiences himself, his thoughts and feelings as something separated from the rest... a kind of optical delusion of his consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty."
- "Not everything that counts can be counted, and not everything that can be counted counts." (Sign hanging in Einstein's office at Princeton)
- Nationalism is an infantile disease. It is the measles of mankind.
- “Example isn't another way to teach, it is the only way to teach”