Lay aside all affectation, you teachers; be yourselves good and virtuous, so that your example may be deeply graven on your pupils' memory until such time as it finds lodgment in their heart. Instead of early requiring acts of charity from my pupil I would rather do them in his presence, taking from him all means of imitating me, as if I considered it an honor not due to his age. For he should by no means be in the habit of thinking a man's duties the same as a child's. Seeing me assist the poor, he questions me about it and, if occasion serve, I answer, "My boy, it is because, since poor people are willing there should be rich people, the rich have promised to take care of those who have no money or cannot earn a living by their labor." "And have you promised it too?" inquires he. "Of course; the money that comes into my hands is mine to use only upon this condition, which its owner has to carry out." After this conversation, and we have seen how a child may be prepared to understand it, other children besides Émile would be tempted to imitate me by acting like a rich man. In this case I would at least see that it should not be done ostentatiously. I would rather have him rob me of my right, and conceal the fact of his generosity. It would be a stratagem natural at his age, and the only one I would pardon in him. The only moral lesson suited to childhood and the most important at any age is, never to injure any one. Even the principle of doing good, if not subordinated to this, is dangerous, false, and contradictory. For who does not do good? Everybody does, even a wicked man who makes one happy at the expense of making a hundred miserable: and thence arise all our calamities. The most exalted virtues are negative: they are hardest to attain, too, because they are unostentatious, and rise above even that gratification dear to the heart of man,--sending another person away pleased with us. If there be a man who never injures one of his fellow-creatures, what good must he achieve for them! What fearlessness, what vigor of mind he requires for it! Not by reasoning about this principle, but by attempting to carry it into practice, do we find out how great it is, how hard to fulfil.