《荀子·乐论》
古代的圣王憎恶那祸乱，所以创作了《雅》、《颂》的音乐来引导他们，使那歌声足够用来表达快乐而不淫荡，使那歌词足够用来阐明正确的道理而不流于花巧，使那音律的宛转或舒扬、繁复或简单、清脆利落或圆润丰满、节制停顿或推进加快，都足够用来感动人的行善之心，使那些邪恶肮脏的风气没有途径能和民众接触。
先王恶其乱也，故制雅颂之声以道之，使其声足以乐而不流，使其文足以辨而不諰，使其曲直繁省廉肉节奏，足以感动人之善心，使夫邪污之气无由得接焉。
The ancient sages hated the chaos, so they created the music of "雅" and "颂" to guide them, so that the singing voice was enough to express joy without being lewd, so that the lyrics were enough to explain the correct principles without being fancy, so that the melody The twists and turns or the stretches, the繁复or the simple, the crisp and sharp or the round and full, the moderation and pause or the promotion and acceleration, are all enough to touch people's hearts to do good, so that those evil and dirty atmospheres have no way to contact the people.