《淮南子·俶真训》
秉持皓白而不污黑，奉行纯粹而不杂糅，身处玄冥而不昏暗，顺从自然而不毁败；孟门、终隆这样的高山阻挡不住，急流旋渊、吕梁这样的深水滞留不住，石涧、太行、飞狐、句望这样的险隘难为不倒。
夫秉皓白而不黑，行纯粹而不糅，处玄冥而不暗，休于天钧而不伪，孟门、终隆之山不能禁，唯体道能不败，湍濑、旋渊、吕梁之深不能留也，太行石涧、飞狐、句望之险不能难也。
Adhere to white without staining black, adhere to purity without mixing, live in darkness without darkness, and obey nature without destruction; Mountains such as Mengmen and Zhonglong cannot block, and deep waters such as turbulent currents and Lvliang cannot stay, and dangers such as Shijian, Taihang, Feihu, and Jvwang cannot be overturned.