As long as I have any choice in the matter, I shall live only in a country where civil liberty, tolerance and equality of all citizens before the law prevail.

A life directed chiefly toward the fulfillment of personal desires will sooner or later always lead to bitter disappointment.

Imagination is greater than knowledge.

It is impossible to solve significant problems using the same knowledge that created them.

This is what the painter, the poet, the speculative philosopher, and the natural scientists do, each in his own fashion.

My position concerning God is that of an agnostic. I am convinced that a vivid consciousness of the primary importance of moral principles for the betterment and ennoblement of life does not need the idea of a law-giver, especially a law-giver who works on the basis of reward and punishment.

Intellectuals solve problems, geniuses prevent them.