We should despair of the human race if these maxims had been made before 1830; but they set forth in so clear a manner the agreements and difficulties which distinguish you, your wife and a lover; they so brilliantly describe what your policy should be, and demonstrate to you so accurately the strength of the enemy, that the teacher has put his _amour-propre_ aside, and if by chance you find here a single new thought, send it to the devil, who suggested this work. LXV. To speak of love is to make love. LXVI. In a lover the coarsest desire always shows itself as a burst of honest admiration. LXVII. A lover has all the good points and all the bad points which are lacking in a husband. LXVIII. A lover not only gives life to everything, he makes one forget life; the husband does not give life to anything. LXIX. All the affected airs of sensibility which a woman puts on invariably deceive a lover; and on occasions when a husband shrugs his shoulders, a lover is in ecstasies. LXX. A lover betrays by his manner alone the degree of intimacy in which he stands to a married woman. LXXI. A woman does not always know why she is in love. It is rarely that a man falls in love without some selfish purpose. A husband should discover this secret motive of egotism, for it will be to him the lever of Archimedes. LXXII. A clever husband never betrays his supposition that his wife has a lover. LXXIII. The lover submits to all the caprices of a woman; and as a man is never vile while he lies in the arms of his mistress, he will take the means to please her that a husband would recoil from. LXXIV. A lover teaches a wife all that her husband has concealed from her. LXXV. All the sensations which a woman yields to her lover, she gives in exchange; they return to her always intensified; they are as rich in what they give as in what they receive. This is the kind of commerce in which almost all husbands end by being bankrupt. LXXVI. A lover speaks of nothing to a woman but that which exalts her; while a husband, although he may be a loving one, can never refrain from giving advice which always has the appearance of reprimand. LXXVII. A lover always starts from his mistress to himself; with a husband the contrary is the case. LXXVIII. A lover always has a desire to appear amiable. There is in this sentiment an element of exaggeration which leads to ridicule; study how to take advantage of this. LXXIX. When a crime has been committed the magistrate who investigates the case knows [excepting in the case of a released convict who commits murder in jail] that there are not more than five persons to whom he can attribute the act. He starts from this premise a series of conjectures. The husband should reason like the judge; there are only three people in society whom he can suspect when seeking the lover of his wife. LXXX. A lover is never in the wrong.