《吕氏春秋·览·审应览》
听别人讲话是要通过其言语观察其思想。听别人讲话却不了解他的思想，那样的言语就与乖戾之言没有区别了。
听言者以言观意也，听言而意不可知，其与桥言无择。
When listening to others it is necessary to observe their thoughts through their words. If one listens to others’ words without understanding their thoughts, then such words are no different from dishonest words.