《资治通鉴·唐纪·唐纪八》
太宗高兴地说： 以前朕认为你比较固执，怀疑你不通达政务，现在看到你议论国家大政方针，确实都切中要害。
上悦曰： 向者朕以卿固执，疑卿不达政事，今卿论国家大体，诚尽其精要。
Taizong said happily: I used to think you were more stubborn and suspected that you did not understand politics. Now I see that you are discussing the major policies of the state and every word is on the point.