It's very depressing to live in a time where it's easier to break an atom than a prejudice.

Laws alone can not secure freedom of expression; in order that every man present his views without penalty there must be spirit of tolerance in the entire population.

Any power must be an enemy of mankind which enslaves the individual by power and by force, whether it arises under the Fascist or the Communist flag. All that is valuable in human society depends upon the opportunity for development accorded to the individual.

Science is the process of making obviously erroneous ideas less obviously erroneous.

In the past it never occurred to me that every casual remark of mine would be snatched up and recorded. Otherwise I would have crept further into my shell.

I have no special talent. I am only passionately curious.

The greatest tragedy of human existence is the illusion of separateness.