Those who educate us make it their concern early to break us of lying and to inculcate the principle that one must always tell the truth. If selfishness were made the basis for this rule, every one would easily understand how by lying he fools away that confidence in him which he hopes to awaken in others, and how correct the maxim proves, Nobody believes a liar even when he tells the truth. Yet, at the same time, he would also feel that he had to meet with truth only him whom _he_ authorized to hear the truth. If a spy walks in disguise through the hostile camp, and is asked who he is, the askers are assuredly entitled to inquire after his name, but the disguised man does not give them the right to learn the truth from him; he tells them what he likes, only not the fact. And yet morality demands, "Thou shalt not lie!" By morality those persons are vested with the right to expect the truth; but by me they are not vested with that right, and I recognize only the right that I impart. In a gathering of revolutionists the police force their way in and ask the orator for his name; everybody knows that the police have the right to do so, but they do not have it from the _revolutionist_, since he is their enemy; he tells them a false name and--cheats them with a lie. The police do not act so foolishly either as to count on their enemies' love of truth; on the contrary, they do not believe without further ceremony, but have the questioned individual "identified" if they can. Nay, the State everywhere proceeds incredulously with individuals, because in their egoism it recognizes its natural enemy; it invariably demands a "voucher," and he who cannot show vouchers falls a prey to its investigating inquisition. The State does not believe nor trust the individual, and so of itself places itself with him in the _convention of lying_; it trusts me only when it has _convinced_ itself of the truth of my statement, for which there often remains to it no other means than the oath. How clearly, too, this (the oath) proves that the State does not count on our credibility and love of truth, but on our _interest_, our selfishness: it relies on our not wanting to fall foul of God by a perjury.