Education can be divided into broad sense and narrow sense. Education in a broad sense refers to all social practice activities that purposefully affect people's physical and mental development. Education in a narrow sense refers to special education, including not only full-time school education, but also half-time and amateur school education, correspondence education, publishing education, radio schools and television schools. According to the reality and future needs of a certain society, it is an activity to guide the educated to acquire knowledge and skills, cultivate ideology and morality, develop intelligence and physical strength, follow the law of physical and mental development of the younger generation, train the educated to adapt to the needs of a certain society (or class) and promote social development. The essence of education is to teach new individuals the ways and means to deal with our objects with the knowledge we already have about our objects and their relationships. It is a process in which one kind of consciousness changes another kind of consciousness. It is a process in which one kind of consciousness covers or even destroys another kind of consciousness in view of the collision, running-in, infiltration and change between consciousness, which may cause pain to individuals. Because any two individuals face different objects and have different or conflicting consciousness from different objects, the recipients of educational activities have certain repulsion. In the real society, in order to weaken the rejection psychology of the recipients, first of all, educational activities are mainly carried out between the young and the old. Older people (or those who get knowledge first) generally live in the position of educators, while young people lack knowledge and are like a whiteboard, so they are educated. The second is to induce through utilitarianism and other means. For example, in ancient times, there was a call for "learning to be an excellent official", and today there is a call for educational goals such as "knowledge is wealth", so that educational activities can be carried out normally.