It is mathematics that offers the exact natural sciences a certain measure of security which, without mathematics, they could not attain.

One should guard against preaching to young people success in the customary form as the main aim in life. The most important motive for work in school and in life is pleasure in work, pleasure in its result, and the knowledge of the value of the result to the community.

So long as there are men there will be wars.

God reveals himself in the orderly harmony of what exists.

Truth is what stands the test of experience.

The human mind is not capable of grasping the Universe. We are like a little child entering a huge library. The walls are covered to the ceilings with books in many different tongues. The child knows that someone must have written these books. It does not know who or how. It does not understand the languages in which they are written. But the child notes a definite plan in the arrangement of the books - a mysterious order which it does not comprehend, but only dimly suspects.

When you look at yourself from a universal standpoint, something inside always reminds or informs you that there are bigger and better things to worry about.

The pursuit of knowledge for its own sake, an almost fanatical love of justice, and the desire for personal independence - these are the features of Jewish tradition that make me thank my stars that I belong to it.

Anger dwells only in the bosom of fools.

There are two ways of resisting war: the legal way and the revolutionary way. The legal way involves the offer of alternative service not as a privilege for a few but as a right for all. The revolutionary view involves an uncompromising resistance, with a view to breaking the power of militarism in time of peace or the resources of the state in time of war.