People come from the animal world and are animalistic, but there is a big difference between civilized people and animals, that is, people have a better sense of things than animals. People can feel, appreciate and comment on beauty because they have an inner feeling about things, which is a manifestation of "natural rationality". Since people have such a high inner feeling ability, works of art have a high appreciation value for people, which is of great practical significance for people to create works of art, express works of art, appreciate works of art and accept the education of works of art.