The love of a harlot, that is to say, the lust of sexual intercourse, which arises from mere external form, and absolutely all love which recognizes any other cause than the freedom of the mind, easily passes into hatred, unless, which is worse, it becomes a species of delirium, and thereby discord is cherished rather than concord. XX With regard to marriage, it is plain that it is in accordance with reason, if the desire of connection is engendered not merely by external form, but by a love of begetting children and wisely educating them; and if, in addition, the love both of the husband and wife has for its cause not external form merely, but chiefly liberty of mind. XXI Flattery, too, produces concord, but only by means of the disgraceful crime of slavery or perfidy; for there are none who are more taken by flattery than the proud, who wish to be first and are not so. XXII There is a false appearance of piety and religion in dejection; and although dejection is the opposite of pride, the humble dejected man is very near akin to the proud. XXIII Shame also contributes to concord, but only with regard to those matters which cannot be concealed. Shame, too, inasmuch as it is a kind of sorrow, does not belong to the service of reason. XXIV The remaining emotions of sorrow which have man for their object are directly opposed to justice, integrity, honor, piety, and religion; and although indignation may seem to present an appearance of equity, yet there is no law where it is allowed to every one to judge the deeds of another, and to vindicate his own or another's right. XXV Affability, that is to say, the desire of pleasing men, which is determined by reason, is related to piety. But if affability arise from an emotion, it is ambition or desire, by which men, generally under a false pretense of piety, excite discords and seditions. For he who desires to assist other people, either by advice or by deed, in order that they may together enjoy the highest good, will strive, above all things, to win their love, and not to draw them into admiration, so that a doctrine may be named after him, nor absolutely to give any occasion for envy. In common conversation, too, he will avoid referring to the vices of men, and will take care only sparingly to speak of human impotence, while he will talk largely of human virtue or power, and of the way by which it may be made perfect, so that men being moved not by fear or aversion, but solely by the emotion of joy, may endeavor as much as they can to live under the rule of reason. XXVI