Had we not pursued the hydrogen bomb, there is a very real threat that we would now all be speaking Russian. I have no regrets.

I tried to contribute to the defeat of the Soviets. If I contributed 1%, it is 1% of something enormous.

When you come to the end of all the light you know, and it's time to step into the darkness of the unknown, faith is knowing that one of two things shall happen: either you will be given something solid to stand on or you will be taught to fly.

I think that intellectuals who end up in hell will have to read page proofs and check indexes there.

Physics is, hopefully, simple. Physicists are not.

The best weapon of a dictatorship is secrecy; the best weapon of a democracy is openness.

U.S. has lost a battle more important and greater than Pearl Harbor.