Everyone knew it was impossible, until a fool who didn't know came along and did it.

The health of society thus depends quite as much on the independence of the individuals composing it as on their close political cohesion.

The wonder of nature does not become smaller because one cannot measure it by the standards of human moral and human aims.

One may say the eternal mystery of the world is its comprehensibility.

As I have said so many times, God doesn't play dice with the world.

If you have never failed, you have never tried anything new.

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.