Ayn Rand

Force and mind are opposites; morality ends where a gun begins.

Happiness is that state of consciousness which proceeds from the achievement of one's values.

Money is the barometer of a society's virtue.

So you think that money is the root of all evil. Have you ever asked what is the root of all money?

The purpose of morality is to teach you, not to suffer and die, but to enjoy yourself and live.

The truth is not for all men, but only for those who seek it.

Civilization is the progress toward a society of privacy. The savage's whole existence is public, ruled by the laws of his tribe. Civilization is the process of setting man free from men.