But the creative principle resides in mathematics. In a certain sense, therefore, I hold true that pure thought can grasp reality, as the ancients dreamed.

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

If men as individuals surrender to the call of their elementary instincts, avoiding pain and seeking satisfaction only for their own selves, the result for them all taken together must be a state of insecurity, of fear, and of promiscuous misery.

The words of language, as they are written or spoken, do not seem to play any role in my mechanism of thought. The physical entities which seem to serve as elements in thought are certain signs and more or less clear images.

What physics looks for: The simplest possible system of thought which will bind together the observed facts.

I do not play games. There is not time for it. When I get through with work, I don't want anything that requires the working of the mind.

Do you believe in immortality? No, and one life is enough for me.