To be sure, it is not the fruits of scientific research that elevate a man and enrich his nature, but the urge to understand, the intellectual work, creative or receptive.

Let me tell you what I look like: pale face, long hair, and a tiny start of a paunch. In addition, an awkward gait, and a cigar in the mouth and a pen in pocket or hand.

The illusion that we are separate from one another is an optical delusion of our consciousness.

The world will not be destroyed by those who do evil, but by those who watch them without doing anything.

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)

You are right in speaking of the moral foundations of science, but you cannot turn around and speak of the scientific foundations of morality.

My scientific work is motivated by an irresistible longing to understand the secrets of nature not by other feelings.