It is not death that we wish to avoid, but life that we wish to live.

Guilt is a rope that wears thin.

There can be no justification for choosing any part of that which one knows to be evil.

I am not primarily an advocate of capitalism, but of egoism; I am not primarily an advocate of egoism, but of reason. If one recognizes the supremacy of reason and applies it consistently, all the rest follows.

Place nothing above the verdict of your own mind.

She had learned, in the slums of her childhood, that honest people were never touchy about the matter of being trusted.

Each man must live as an end in himself and follow his own rational self-interest.