The world is so full of possibilities that dogmatism is simply indecent.

I am strongly drawn to the simple life and am often oppressed by the feeling that I am engrossing an unnecessary amount of the labour of my fellow men. I regard class differences as contrary to justice and, in the last resort, based on force. I also consider that plain living is good for everybody, physically and mentally.

Princeton is a wonderful little spot. A quaint and ceremonious village of puny demigods on stilts.

Empathy is patiently and sincerely seeing the world through the other person's eyes. It is not learned in school; it is cultivated over a lifetime.

It is open to every man to choose the direction of his striving; and also every man may draw comfort from Lessing's fine saying, that the search for truth is more precious than its possession.

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

My success wasn't so much due to intelligence, but the fact that I stuck with problems longer.