Since the mathematicians have invaded the theory of relativity I do not understand it myself any more.

I cannot imagine a God who rewards and punishes the objects of his creation, whose purposes are modeled after our own -- a God, in short, who is but a reflection of human frailty. Neither can I believe that the individual survives the death of his body, although feeble souls harbor such thoughts through fear or ridiculous egotisms.

Rejoice with your family in the beautiful land of life.

A perfection of means, and confusion of aims, seems to be our main problem.

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.

The step between genius and insanity is very short.

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.