I believe in Spinoza's God, who reveals Himself in the lawful harmony of the world, not in a God who concerns Himself with the fate and the doings of mankind... to Rabbi Herbert Goldstein (1929)

One cannot learn so well as by experiencing it oneself.

If one studies too zealously, one easily loses his pants.

The most beautiful gift of nature is that it gives one pleasure to look around and try to comprehend what we see.

Not all that counts, can be counted

Since I do not forsee that atomic energy is to be a great boon for a long time, I have to say that for the present it is a menace. Perhaps it is well that it should be. It may intimidate the human race into bringing order into its international affairs, which, without the presence of fear, it would not do.

Try first to be a man of value; success will follow.