Sex is a physical life, following the principle of pleasure. Love is a spiritual life, following the principle of ideals. Marriage is a social life, following the principle of reality. Many people think that love and marriage are the same thing, but only a few understand that the happiness of marriage has nothing to do with love. Love is too pure, but marriage is very complex. Love is the heroic dream in a weary life, and also a poetic description of the impulse to reproduce. However, the reality of marriage has nothing to do with love; it is merely two secular individuals teaming up based on compatibility, through a contract, to level up together. Therefore, in essence, marriage is an institution, an economic relationship, a contract in which two people cooperate, share risks, and spend their lives together. In marriage law, you will find that it revolves around four words: how to divide the money. In ancient times, men were only responsible for mating, while women were responsible for raising offspring, but there were no fixed partners, nor was there the concept of love. With the emergence of private property, many males began to become wealthy; they only wanted to pass on their accumulated possessions to their sons. However, the method of judging whether someone is their offspring based on appearance became increasingly unreliable, leading to the establishment of the marriage system. This system has its pros and cons. The advantage is that people have fixed partners, while the disadvantage is that it goes against the reproductive instincts of animals. Thus, modern civilization has been guiding people to restrain their instincts and beautify them. To dress these naked instincts in a splendid coat, the concept of love was born. Why do you keep thinking about someone? It is because you are not really missing that person, but rather the fearless version of yourself at that time, and the wonderful feelings that recalling that history brings you. Some say that love is a high fever, and longing is an unending cough. But from a medical perspective, love is a chemical reaction; hormones determine infatuation, dopamine determines lasting love, adrenaline determines whether to take action, and self-esteem determines who speaks first, while the reality of lifespan determines who leaves whom first. When love comes, the reason you feel wonderful is that the stimulation from dopamine creates an illusion, making you believe you can remain fervent forever. Unfortunately, no one’s body can withstand such stimulation, meaning a person cannot always be in this peak state of rapid heartbeat. The intense secretion of dopamine will exhaust our brains, so the brain has to let those chemical components begin their natural metabolism. This process may be quick or may take 3 to 4 years, but as dopamine decreases and disappears, passion fades, and love returns to normalcy. A few days ago, I saw a set of data indicating that arranged marriages have a much lower divorce rate than those based on free love. The reason is that parents do not care whether you love each other; they only care about the compatibility between you and your partner, which is the issue that should be seriously considered before marriage. Many people think that once they are married, they have achieved their goal, and they begin to wait for happiness. However, marriage is the beginning of a brand new relationship, requiring more maintenance and management than during dating. If you cannot see this, you will definitely face many difficulties. A bad marriage hides a bad self; essentially, being with anyone is about being with yourself. Love is a brief and splendid firework, while marriage is that bowl of steaming white porridge you wake up to every morning. We once thought love was about finding a perfect match, but later realized that there is no such thing as a natural perfect match in the world. The truth is that only when two people are mutually tolerant, jointly manage, and strive towards each other can they become a perfect match. Love is romantic, but what is more romantic than love is the long-lasting companionship of an old man and an old woman.