"We have to find a way to transcend the fear and the hatred that led to the creation of the atomic bomb."

"It is perfectly obvious that the whole world is going to hell. The only possible chance that it might not is that we do not attempt to prevent it from doing so."

"Truth, not a pet, is man's best friend."

"In the spring of 1929, I returned to the United States. I was homesick for this country. I had learned in my student days a great deal about the new physics. I wanted to pursue this myself, to explain…"

"If I had to choose between the two evils, I would rather have a world with no nuclear weapons than a world with nuclear weapons."