"be sure your pupil, as he begins to understand the value of your care for him, will be grateful for it, provided you have not put a price upon it; and this will give you an authority over his heart which nothing can overthrow. But beware of losing this advantage before it is really yours, beware of insisting on your own importance. Boast of your services and they become intolerable; forget them and they will not be forgotten. Until the time comes to treat him as a man let there be no question of his duty to you, but his duty to himself. Let him have his freedom if you would make him docile; hide yourself so that he may seek you; raise his heart to the noble sentiment of gratitude by only speaking of his own interest. Until he was able to understand I would not have him told that what was done was for his good; he would only have understood such words to mean that you were dependent on him and he would merely have made you his servant. But now that he is beginning to feel what love is, he also knows what a tender affection may bind a man to what he loves; and in the zeal which keeps you busy on his account, he now sees not the bonds of a slave, but the affection of a friend. Now there is nothing which carries so much weight with the human heart as the voice of friendship recognised as such, for we know that it never speaks but for our good. We may think our friend is mistaken, but we never believe he is deceiving us."