Because the passion depended upon an illusion, which represented that which has only value for the species as valuable for the individual, the deception must vanish after the attainment of the end of the species. The spirit of the species which took possession of the individual sets it free again. Forsaken by this spirit, the individual falls back into its original limitation and narrowness, and sees with wonder that after such a high, heroic, and infinite effort nothing has resulted for its pleasure but what every sexual gratification affords. Contrary to expectation, it finds itself no happier than before. It observes that it has been the dupe of the will of the species. Therefore, as a rule, a Theseus who has been made happy will forsake his Ariadne. If Petrarch’s passion had been satisfied, his song would have been silenced from that time forth, like that of the bird as soon as the eggs are laid. Here let me remark in passing that however much my metaphysics of love will displease the very persons who are entangled in this passion, yet if rational considerations in general could avail anything against it, the fundamental truth disclosed by me would necessarily fit one more than anything else to subdue it. But the saying of the old comedian will, no doubt, remain true: “_Quæ res in se __ neque consilium, neque modum habet ullum, eam consilio regere non potes._” Marriages from love are made in the interest of the species, not of the individuals. Certainly the persons concerned imagine they are advancing their own happiness; but their real end is one which is foreign to themselves, for it lies in the production of an individual which is only possible through them. Brought together by this aim, they ought henceforth to try to get on together as well as possible. But very often the pair brought together by that instinctive illusion, which is the essence of passionate love, will, in other respects, be of very different natures. This comes to light when the illusion vanishes, as it necessarily must. Accordingly love marriages, as a rule, turn out unhappy; for through them the coming generation is cared for at the expense of the present. “_Quien se casa por amores, ha de vivir con dolores_” (Who marries from love must live in sorrow), says the Spanish proverb. The opposite is the case with marriages contracted for purposes of convenience, generally in accordance with the choice of the parents. The considerations prevailing here, of whatever kind they may be, are at least real, and cannot vanish of themselves. Through them, however, the happiness of the present generation is certainly cared for, to the disadvantage of the coming generation, and notwithstanding this it remains problematical. The man who in his marriage looks to money more than to the satisfaction of his inclination lives more in the individual than in the species; which is directly opposed to the truth; hence it appears unnatural, and excites a certain contempt. A girl