..... However, there is no more unfortunate combination than love marriage-it is precisely because the goal of marriage is to continue the race, not personal happiness. There is a Spanish proverb that "people who get married because of love must live in pain". Almost half of the literature about marriage looks silly and funny, because they regard marriage as a match, not an arrangement of racial continuity. Once the reproductive goal is achieved, it seems that it doesn't matter whether the baby's parents love each other forever or just temporarily. Marriages that follow parents' advice are often happier than love marriages. However, a woman who dares to disobey her parents' orders and marry for love is valuable in a sense, because "she chose the most important thing and followed her own nature (more precisely, the nature of the whole human race), while her parents dissuaded her by the principle of personal egoism". ..... Love is the best eugenic. Because love deceives nature, marriage destroys love and inevitably leads to disillusionment. Only philosophers can get happiness in marriage, but philosophers never get married. "Everyone is looking for a spouse who can make up for his own defects in order to avoid further inheritance of these defects. A weak man will find a strong woman, and everyone regards the advantages that the other person has but he doesn't have as a kind of beauty ... The constitutions of both sides must be like this: one person is a perfect complement and supplement to the other, which is exactly what the other person wants. Here, personal behavior unconsciously follows something higher than itself to give orders ... everyone will lose their attraction to the opposite sex after his or her reproductive stage. Young and not beautiful is still attractive, and beautiful and not young is nothing. The essence of love is not mutual admiration, but mutual possession. "