I must be willing to give up what I am in order to become what I will be.

The only real valuable thing is intuition.

Adversity introduces a man to himself.

(Reply on what constitutes scientific proof:)"The question is much too difficult for me.

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.

One is born into a herd of buffaloes and must be glad if one is not trampled under foot before one's time.

Energy cannot be created or destroyed, it can only be changed from one form to another.