Plato is endogenous. Plato believed that "ideas" exist innately in the human soul. This view belongs to the endogenous theory. The main point of view of endogenous theory: It emphasizes that the power of human physical and mental development mainly comes from the person's own inner needs, and the order of physical and mental development is also determined by the physical and mental maturity mechanism. Endogeny emphasizes the decisive role of heredity in human development. The role of education is only to create conditions for human development, but it cannot change or determine human development. In addition to Plato, representatives of the endogenous theory include Mencius, Gorky, Rousseau, etc.