I cannot accept any concept of God based on the fear of life or the fear of death, or blind faith. I cannot prove to you that there is no personal God, but if I were to speak of him I would be a liar.

There is no vaccine against stupidity.

Three Rules of Work: Out of clutter find simplicity. From discord find harmony. In the middle of difficulty lies opportunity.

Without the sense of fellowship with men of like mind... life would have seemed to me empty.

No fairer destiny could be allotted to any physical theory than that it should of itself point out the way to the introduction of a more comprehensive theory, in which it lives on as a limiting case.

I should very much like to remain in the darkness of not having been analyzed.

It has often been said, and certainly not without justification, that the man of science is a poor philosopher.