The ideal for which it stands in the state is liberty. It stands for liberty for the very simple reason with which this rough analysis started. It is the only one of these institutions that is at once necessary and voluntary. It is the only check on the state that is bound to renew itself as eternally as the state, and more naturally than the state. Every sane man recognises that unlimited liberty is anarchy, or rather is nonentity. The civic idea of liberty is to give the citizen a province of liberty; a limitation within which a citizen is a king. This is the only way in which truth can ever find refuge from public persecution, and the good man survive the bad government. But the good man by himself is no match for the city. There must be balanced against it another ideal institution, and in that sense an immortal institution. So long as the state is the only ideal institution the state will call on the citizen to sacrifice himself, and therefore will not have the smallest scruple in sacrificing the citizen. The state consists of coercion; and must always be justified from its own point of view in extending the bounds of coercion; as, for instance, in the case of conscription. The only thing that can be set up to check or challenge this authority is a voluntary law and a voluntary loyalty. That loyalty is the protection of liberty, in the only sphere where liberty can fully dwell.
— The Superstition of Divorce (1920).