《淮南子·齐俗训》
天下是非没有固定的标准，世人各自以自己的是当成是，把自己的非当成非。他们所认为的是与非各不相同，都以自己为是而以别人为非。
天下是非无所定，世各是其所是而非其所非，所谓是与非各异，皆自是而非人。
There is no fixed standard for right and wrong in the world. Each person regards their own right as right and their own wrong as wrong. Their understanding of right and wrong is different, all claiming their own right and the other's wrong.