《魏书·列传·卷七》
当面背后不相同，事情涉及到欺诈谄谀，这不是所谓论道之士的德行，更失去大臣的体统，如万一有倾覆失败，当是由于各位谄谀的臣子。 
面背不同，事涉欺佞，非所谓论道之德，更失国士之体。或有倾侧，当曰公辈佞臣。 
It is not what is called the virtue of a scholar when there is a difference in what is said in person and in the absence of the person concerned, when affairs involve deception and flattery; moreover, it makes the behaviour of ministers lose its proper character. If by chance there should be any destruction or failure, it must be due to flattering ministers.