Most people say that it is the intellect which makes a great scientist. They are wrong: it is character.

Any brief military advantage the USA might gain with nuclear weapons would be offset by political and psychological losses and damage to American prestige. The United States might even touch off a worldwide armaments race.

The life of the individual has meaning only insofar as it aids in making the life of every living thing nobler and more beautiful. Life is sacred, that is to say, it is the supreme value, to which all other values are subordinate.

To invent something, all you need is imagination and a big pile of junk.

Creativity is the residue of time wasted.

Force always attracts men of low morality.

To the extent math refers to reality, we are not certain to the extent we are certain, math does not refer to reality.