The sea, the stars, the night wind in waste places, mean more to me than even the human beings I love best.

Be isolated, be ignored, be attacked, be in doubt, be frightened, but do not be silenced.

The governors of the world believe, and have always believed, that virtue can only be taught by teaching falsehood, and that any man who knew the truth would be wicked. I disbelieve this, absolutely and entirely. I believe that love of truth is the basis of all real virtue, and that virtues based upon lies can only do harm.

Mysticism is, in essence, little more than a certain intensity and depth of feeling in regard to what is believed about the universe.

Many a marriage hardly differs from prostitution, except being harder to escape from.

Ordinary language is totally unsuited for expressing what physics really asserts, since the words of everyday life are not sufficiently abstract. Only mathematics and mathematical logic can say as little as the physicist means to say.

The secret of happiness is this: let your interests be as wide as possible, and let your reactions to the things and persons that interest you be as far as possible friendly rather than hostile.