"The mind is not a vessel to be filled, but a fire to be kindled."

"We have to find a way to use this power for good, not for evil."

"I feel that in a world where atomic bombs are possible, the only safety is in a world where atomic bombs are no longer needed."

"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."

"The physicists have known sin; and this is a knowledge which they cannot lose."