Immanuel Kant, an influential 18th-century German philosopher, is known for his profound ideas on ethics and human relationships. His statement, 'Marriage is the union of two persons for the lifelong possession of each other’s sexual attributes,' has sparked significant debate. While it may seem cold and mechanical to modern readers, this definition reflects Kant's belief in marriage as a moral framework that transforms physical desire into a lawful union. He argued that both partners enter into a reciprocal agreement, thus avoiding the objectification of individuals. However, contemporary critics argue that the term 'possession' is dehumanizing and reflects outdated patriarchal views. Despite these criticisms, Kant's quote encourages reflection on the essence of marriage, prompting questions about love, duty, and partnership. Kant's ethical principle, the 'Categorical Imperative,' underpins his views, emphasizing the importance of treating individuals with dignity. Today, his ideas continue to influence discussions about marriage, highlighting the evolution of its definition from a legal institution to a union based on emotional compatibility.