If not for me, the H-bomb would have been developed in Russia first. In the U.S., we'd now be speaking Russian.

Physics without mathematics is meaningless.

It is often claimed that knowledge multiplies so rapidly that nobody can follow it. I believe this is incorrect. At least in science it is not true. The main purpose of science is simplicity and as we understand more things, everything is becoming simpler. This, of course, goes contrary to what everyone accepts.

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

When you're certain you cannot be fooled, you become easy to fool.

There is a time for scientists and movie stars and those who have flown the atlantic to restrain their opinions lest they be taken more seriously than they should be.

I am guilty of the great crime of optimism.