Your comment mentioned the three major problems of mankind. This is indeed a widely circulated literary concept. According to traditional literary and philosophical views, these three questions are usually described as: Who am I? I am referring to the existence of individual self-awareness. Who am I? This was a philosophical question, as well as a psychological question, which involved the individual's identity and cognition. Where did I come from? I am referring to the origin and life course of an individual. Where did I come from? This was a biological and philosophical question that involved the individual's understanding of their own existence and origin. Where am I going? I'm talking about the individual's life goal and value. Where am I going? This was a philosophical question, and also an ethical question, which involved the individual's expectations and pursuit of their own future. In novels, these three questions were often used to explore the nature of human beings, the meaning of existence, and the goal of life. They were also often used to shape profound characters and plots.