《淮南子·原道训》
所以，子夏由于处在循道还是贪欲的思想斗争而枯瘦，又因由于得道循道而日益肥胖。圣人就是不让自身受外物役使，不以贪欲来搅乱中和天性。
故子夏心战而臞，得道而肥，圣人不以身役物，不以欲滑和。
Consequently, Zi Xia became emaciated due to the ideological battle between following the Way and pursuing desires, and grew increasingly plump due to having obtained the Way and following the Way. The sage does not allow himself to be controlled by external things, nor does he allow desires to disrupt his harmonious nature.