折疑論 1.18

1.18

巢許韜光於箕岫。豈為道揚於世。而世自揚其道（巢地名韜藏也。莊子讓王篇曰。堯以天下讓許由。許由不受。隱於箕岫山）。

Chaofu and Xu You concealed their brilliance at Mount Jishan; how could they have done so to promote the Way in the world? Yet the world naturally promoted their Way. (Chao is a place name; 'to conceal' means to hide away. Zhuangzi's chapter 'Yielding the Throne' says: Yao wished to yield the realm to Xu You, but Xu You would not accept, and hid on Mount Jishan.)