I believe in intuitions and inspirations...I sometimes FEEL that I am right. I do not KNOW that I am.

So long as there are men, there will be wars.

If my theory of relativity is proven successful, Germany will claim me as a German and France will declare me a citizen of the world. Should my theory prove untrue, France will say that I am a German, and Germany will declare that I am a Jew.

Without deep reflection one knows from daily life that one exists for other people.

Mankind must give up war in the Atomic Era. What is at stake is the life or death of humanity.

When the nazis came to power, I looked to the universities that prided themselves upon their intellectual freedom, and they failed me. I looked to the German press, which prided itself on the freedom of the press, and it failed me. Until at last the churches stood alone, and that for which I once had little regard earned my respect.

It's no accident that capitalism has brought with it progress, not merely in production but also in knowledge. Egoism and competition are, alas, stronger forces than public spirit and sense of duty.