A theory is something nobody believes, except the person who made it. An experiment is something everybody believes, except the person who made it.

Warfare cannot be humanized.

It is abhorrent to me when a fine intelligence is paired with an unsavory character.

I have remained a simple fellow who asks nothing of the world; only my youth is gone - the enchanting youth that forever walks on air.

We [Jews] have no other means of self-defense than our solidarity

The release of atomic power has changed everything except our way of thinking ... the solution to this problem lies in the heart of mankind. If only I had known, I should have become a watchmaker. (1945)

Anybody who really wants to abolish war must resolutely declare himself in favor of his own country's resigning a portion of sovereignty in place of international institutions.