《韩非子·八说》
音乐的高低清浊，如果不亲自去听作出判断而取决于主管乐队的官吏，奏乐的盲人们就会轻视君主而尊重乐官了。
上下清浊，不以耳断而决于乐正，则瞽工轻君而重于乐正矣。
How high, low, clear and turbid is the music? If you don't personally listen and make judgments, but rely on the official in charge of the orchestra, the blind musicians will despise the monarch and respect the music official.