For an idea that does not first seem insane, there is no hope.

Failure is success in progress

If I am right the Germans will say I was a German, and the French will say I was a Jew; If I am wrong the Germans will say I was a Jew and the French will say I was a German.

Not until the creation and maintenance of decent conditions of life for all men are recognized and accepted as a common obligation of all men and all countries — not until then shall we, with a certain degree of justification, be able to speak of mankind as civilized.

It is my inner conviction that the development of science seeks in the main to satisfy the longing for pure knowledge.

The single most important decision any of us will ever make is whether or not to believe the universe is friendly.

The greatest scientists are artists as well.