《新唐书·列传·卷六十八》
所以天子不知道这种情况，还以为我说的话虽然没被施行，仍足以起劝勉作用。
天子不知其然，以为言虽不行，犹足以劝。
Therefore, the emperor did not know about this situation, but he thought that even if my words were not implemented, they would be sufficient to encourage him.