The intuitive mind is a sacred gift and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift.

The most fundamental question we can ever ask ourselves is whether or not the universe we live in is friendly or hostile.

Since I have introduced this term I had always a bad conscience. . . . I cannot help to feel it strongly and I am unable to believe that such an ugly thing should be realized in nature.

Women always worry about things that men forget; men always worry about things women remember.

It is a very high goal which, with our weak powers, we can reach only very inadequately, but which gives a sure foundation to our aspirations and valuations.

Politics is more difficult than physics.

There is nothing divine about morality, it is a purely human affair.