Confucius commented on this song in the Book of Songs, "Music without lewdness and sorrow without injury", and its first two sentences were ""

Qin said to me: Poetry is like singing more, so it is better to sing less. It's better not to sing poetry if you want to sing less. I call it Qin's saying: neither much nor much. Don't sing, don't sing. Zhilan is in the room and can't be odorless. The stone vibrates, but it cannot be silent. Evil is sad, sad but not hurt. If you are kind, you will enjoy it, and you will enjoy it without lewdness.