Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.

Do you really believe that the moon isn’t there when nobody looks?

If I would be a young man again and had to decide how to make my living, I would not try to become a scientist or scholar or teacher. I would rather choose to be a plumber or a peddler in hope to find that modest degree of independence still available under present circumstances.

This change in the conception of reality is the most profound and the most fruitful that physics has experienced since the time of Newton. Refering to James Clerk Maxwell's contributions to physics.

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.

The development of general ability for independent thinking and judgment should always be placed foremost, not the acquisition of special knowledge.

There is no salvation for civilization, or even the human race, other than the creation of a world government.