The greatest tragedy of human existence is the illusion of separateness.

Only the one who does not question is safe from making a mistake.

I simply imagine it so, then go about to prove it.

This is a time, when there seems to be a particular need for friends of wisdom and truth to join together.

A country cannot simultaneously prepare and prevent war. I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones. The distinctions separating the social classes are false; in the last analysis they rest on force.

Those instrumental goods which should serve to maintain the life and health of all human beings should be produced by the least possible labour of all.

I believe in mystery and, frankly, I sometimes face this mystery with great fear. In other words, I think that there are many things in the universe that we cannot perceive or penetrate, and that also we experience some of the most beautiful things in life only in a very primitive form. Only in relation to these mysteries do I consider myself to be a religious man.