If you cannot explain it simply, you do not understand it enough.

One does not make wars less likely by formulationg rules of warfare... war cannot be humanized. It can only be eliminated.

Conviction is a good motive, but a bad judge.

[Mystery] is the fundamental emotion that stands at the cradle of true art and true science.

The cult of individual personalities is always, in my view, unjustified. To be sure, nature distributes her gifts variously among her children. But there are plenty of the well-endowed ones too, thank God, and I am firmly convinced that most of them live quiet, unregarded lives.

Men should continue to fight, but they should fight for things worth while, not for imaginary geographical lines, racial prejudices and private greed draped in the color's of patriotism.

I made one great mistake in my life-when I signed the letter to President Roosevelt recommending that atom bombs be made but there was some justification-the danger that the Germans would make them.