There is nothing divine about morality; it is a purely human affair. If people are good only because they fear punishment, and hope for reward, then we are a sorry lot indeed. What the individual can do is to give a fine example, and to have the courage to uphold ethical values .. in a society of cynics.

I regard class differences as contrary to justice and, in the last resort, based on force.

The most difficult part about understanding something is that we understand it all.

Intuitive powers played a central role in my scientific work, not wild speculation, yet a valued resource when no other approach was available.

Nothing is more destructive of respect for the government and the law of the land than passing laws which cannot be enforced.

I have no particular talent. I am merely inquisitive.

The only rational way of educating is to be an example. If one can't help it, a warning example.