《贞观政要·卷五·论诚信》
于是正直的忠臣不能完全陈述自己的想法，朝中重臣也不能与之争辩是非。
正臣不得尽其言，大臣莫能与之争。
As a result, upright and loyal ministers cannot fully express their thoughts, and important ministers in the imperial court cannot argue with them.