《晋书·志·第十九章》
君主迷乱软弱，人们就背叛他，上天就不要他，如果没有圣明君主被诛杀，就有篡位杀身的祸患，因此有下攻上的弊病。
君乱且弱，人之所叛，天之所去，不有明王之诛，则有篡杀之祸，故有下人伐上之痾。
When a sovereign is soft and weak, the people will betray him, and Heaven will reject him. If a wise sovereign is executed, there will be the disaster of a usurper killing a true one. Therefore, there is the evil of the lower attacking the higher.