My relationship to the Jewish people has become my strongest human bond, ever since I became fully aware of our precarious situation among the nations of the world.

A problem defined, is a problem half solved.

I believe serious progress (in the abolition of war) can be achieved only when men become organized on an international scale and refuse, as a body, to enter military or war service.

There is nothing divine about morality, it is a purely human affair.

I shall never believe that God plays dice with the world.

Things you can get access to, you should never memorize.

It would be better if you began to teach others only after you yourself have learned something.