《后汉书·列传·刘玄刘盆子列传》
三公上应天上的星宿，九卿下法江河湖海，所以人只是替天行事。
夫三公上应台宿，九卿下括河海，故天工人其代之。
The Three Dukes correspond to the stars in the heavens, and the Nine Ministers follow the pattern of rivers and lakes. Therefore, man is merely acting in accordance with the will of Heaven.