No man may initiate the use of physical force against others. No man-or group or society or government-has the right to assume the role of a criminal and initiate the use of physical compulsion against any man. Men have the right to use physical force only in retaliation and only against those who initiate its use. The ethical principle involved is simple and clear-cut: it is the difference between murder and self-defense.

You must be the kind of man who can get things done. But to get things done, you must love the doing, not the secondary consequences.

Definitions are the guardians of rationality, the first line of defense against the chaos of mental disintegration.

Achieving life is not the equivalent of avoiding death.

The man at the top of the intellectual pyramid contributes the most to all those below him, but gets nothing except his material payment, receiving no intellectual bonus from others to add to the value of his time. The man at the bottom who, left to himself, would starve in his hopeless ineptitude, contributes nothing to those above him, but receives the bonus of all of their brains. Such is the nature of the 'competition' between the strong and the weak of the intellect. Such is the pattern of 'exploitation' for which you have damned the strong.

Morally, the promise of an impossible “right” to economic security is an infamous attempt to abrogate the concept of rights. It can and does mean only one thing: a promise to enslave the men who produce, for the benefit of those who don’t.

Civilization is the progress toward a society of privacy.