《后汉书·列传·郑范陈贾张列传》
现在《左氏》推崇君父之道，卑视臣子，这是强干弱枝，劝痒戒恶，道理极为明白切当，直接顺理成章。
今《左氏》崇君父，卑臣子，强干弱枝，劝善戒善，至明至切，至直至顺。
Now, the Zuozhuan promotes the way of the ruler and father, and despises the minister and son. This is a way of strengthening the strong and weakening the weak, persuading the good and deterring the evil. The reasoning is extremely clear and appropriate, and it goes straight to the point.