When he becomes capable of affection, he becomes aware of the affection of others, [Footnote: Affection may be unrequited; not so friendship. Friendship is a bargain, a contract like any other; though a bargain more sacred than the rest. The word "friend" has no other correlation. Any man who is not the friend of his friend is undoubtedly a rascal; for one can only obtain friendship by giving it, or pretending to give it.] and he is on the lookout for the signs of that affection. Do you not see how you will acquire a fresh hold on him? What bands have you bound about his heart while he was yet unaware of them! What will he feel, when he beholds himself and sees what you have done for him; when he can compare himself with other youths, and other tutors with you! I say, "When he sees it," but beware lest you tell him of it; if you tell him he will not perceive it. If you claim his obedience in return for the care bestowed upon him, he will think you have over-reached him; he will see that while you profess to have cared for him without reward, you meant to saddle him with a debt and to bind him to a bargain which he never made. In vain you will add that what you demand is for his own good; you demand it, and you demand it in virtue of what you have done without his consent. When a man down on his luck accepts the shilling which the sergeant professes to give him, and finds he has enlisted without knowing what he was about, you protest against the injustice; is it not still more unjust to demand from your pupil the price of care which he has not even accepted! Ingratitude would be rarer if kindness were less often the investment of a usurer. We love those who have done us a kindness; what a natural feeling! Ingratitude is not to be found in the heart of man, but self-interest is there; those who are ungrateful for benefits received are fewer than those who do a kindness for their own ends. If you sell me your gifts, I will haggle over the price; but if you pretend to give, in order to sell later on at your own price, you are guilty of fraud; it is the free gift which is beyond price. The heart is a law to itself; if you try to bind it, you lose it; give it its liberty, and you make it your own. When the fisherman baits his line, the fish come round him without suspicion; but when they are caught on the hook concealed in the bait, they feel the line tighten and they try to escape. Is the fisherman a benefactor? Is the fish ungrateful? Do we find a man forgotten by his benefactor, unmindful of that benefactor? On the contrary, he delights to speak of him, he cannot think of him without emotion; if he gets a chance of showing him, by some unexpected service, that he remembers what he did for him, how delighted he is to satisfy his gratitude; what a pleasure it is to earn the gratitude of his benefactor. How delightful to say, "It is my turn now." This is indeed the teaching of nature; a good deed never caused ingratitude.