The mark of a law for free beings is the fact that it apportions reward for obedience and punishment for disobedience. The laws to which an action must conform in order to deserve the predicate "good" are three in number (II. 28): by the divine law "men judge whether their actions are sins or duties"; by the civil law, "whether they be criminal or innocent" (deserving of punishment or not); by the law of opinion or reputation, "whether they be virtues or vices." The first of these laws threatens immorality with future misery; the second, with legal punishments; the third, with the disapproval of our fellow-men. The third law, the law of opinion or reputation, called also philosophical, coincides on the whole, though not throughout, with the first, the divine law of nature, which is best expressed in Christianity, and which is the true touchstone of the moral character of actions. While Locke, in his polemic against innate ideas, had emphasized the diversity of moral judgments among individuals and nations (as a result of which an action is condemned in one place and praised as virtuous in another), he here gives prominence to the fact of general agreement in essentials, since it is only natural that each should encourage by praise and esteem that which is to his advantage, while virtue evidently conduces to the good of all who come into contact with the virtuous. Amid the greatest diversity of moral judgments virtue and praise, vice and blame, go together, while in general that is praised which is really praiseworthy--even the vicious man approves the right and condemns that which is faulty, at least in others. Locke was the first to call attention to general approval as an external mark of moral action, a hint which the Scottish moralists subsequently exploited. The objection that he reduced morality to the level of the conventional is unjust, for the law of opinion and reputation did not mean for him the true principle of morality, but only that which controls the majority of mankind--If anyone is inclined to doubt that commendation and disgrace are sufficient motives to action, he does not understand mankind; there is hardly one in ten thousand insensible enough to endure in quiet the constant disapproval of society. Even if the lawbreaker hopes to escape punishment at the hands of the state, and puts out of mind the thought of future retribution, he can never escape the disapproval of his misdeeds on the part of his fellows. In entire harmony with these views is Locke's advice to educators, that they should early cultivate the love of esteem in their pupils.