於是唐姑讒之。
Then Tang Gu slandered him.
復見惠王，懷怒以待之。
When Shezi had a second audience, the king received him with anger showing in his face.
非其說異也，所聽者易也。
It was not that his likes had changed, but rather that what he listened to had changed.
故以徵為羽，非絃之罪也；以甘為苦，非味之過也。
Thus, when the zhi tone changes to the yu tone, it is not the fault of the string; and, when something sweet turns bitter, it is not the flavor that is at fault.
Mizi Xia Loses Favor with the Ruler of Wei