《淮南子·泰族训》
所以皮弁冠冕和大车，可以使用而不宜过分喜爱；大羹的味道，可以食用但不宜过分嗜好；红色丝弦穿底的琴瑟弹奏出的乐曲，一唱而三叹，可以听而不宜沉浸在欢快之中。
故弃冕铬舆，可服而不可好也；太羹之和，可食而不可嗜也；朱弦漏越，一唱而三叹，可听而不可快也。
Therefore, the leather hat and crown and the large carriage can be used but should not be overly loved; the taste of the great soup can be enjoyed but should not be overly indulged in; the music played on the qin and se with red silk strings, which is sung three times with a sigh, can be listened to but should not be immersed in joy.