I would have you so choose the company of a youth that he should think well of those among whom he lives, and I would have you so teach him to know the world that he should think ill of all that takes place in it. Let him know that man is by nature good, let him feel it, let him judge his neighbour by himself; but let him see how men are depraved and perverted by society; let him find the source of all their vices in their preconceived opinions; let him be disposed to respect the individual, but to despise the multitude; let him see that all men wear almost the same mask, but let him also know that some faces are fairer than the mask that conceals them. It must be admitted that this method has its drawbacks, and it is not easy to carry it out; for if he becomes too soon engrossed in watching other people, if you train him to mark too closely the actions of others, you will make him spiteful and satirical, quick and decided in his judgments of others; he will find a hateful pleasure in seeking bad motives, and will fail to see the good even in that which is really good. He will, at least, get used to the sight of vice, he will behold the wicked without horror, just as we get used to seeing the wretched without pity. Soon the perversity of mankind will be not so much a warning as an excuse; he will say, "Man is made so," and he will have no wish to be different from the rest. But if you wish to teach him theoretically to make him acquainted, not only with the heart of man, but also with the application of the external causes which turn our inclinations into vices; when you thus transport him all at once from the objects of sense to the objects of reason, you employ a system of metaphysics which he is not in a position to understand; you fall back into the error, so carefully avoided hitherto, of giving him lessons which are like lessons, of substituting in his mind the experience and the authority of the master for his own experience and the development of his own reason. To remove these two obstacles at once, and to bring the human heart within his reach without risk of spoiling his own, I would show him men from afar, in other times or in other places, so that he may behold the scene but cannot take part in it. This is the time for history; with its help he will read the hearts of men without any lessons in philosophy; with its help he will view them as a mere spectator, dispassionate and without prejudice; he will view them as their judge, not as their accomplice or their accuser. To know men you must behold their actions. In society we hear them talk; they show their words and hide their deeds; but in history the veil is drawn aside, and they are judged by their deeds. Their sayings even help us to understand them; for comparing what they say and what they do, we see not only what they are but what they would appear; the more they disguise themselves the more thoroughly they stand revealed.