Music is perfect: it completely melts the difference between essence and form, and is consistent inside and outside. It touches people's hearts purely from the senses, resonates with the sadness and music in their ears, and can fundamentally cultivate people's character.
③ Music has expressive function: because music is a universal hobby of human beings and its lifeline is harmony, it can naturally have a harmonious influence on people's minds, so it can both "disperse" and "purify" people's emotions.
④ Music has moving function: music directly moves the senses and causes physiological reactions, and its cadence and length are often commensurate with the special rhythm and pattern of human emotions.
⑤ Music has an influential function: the harmony of music permeates the whole body and mind, becomes a fixed pattern, habits become nature, and the activities of body and mind do not violate the principle of harmony everywhere.