本文的目的在於闡明《荀子》和《呂氏春秋》兩書中「公」概念的主要思想角色，是將原來比較抽象的秩序原理落實於治理天下全部人民的具體方策上。《荀子》「公」論的思想意義應該在於將原來只有聖人般的最高統治人能夠達成的秩序原理境界「開放」給中間統治層的「士」來達成，甚至是到人民大眾。相形之下，《呂氏春秋》的「公」概念則主要是最高統治者首要實踐的德目。正如〈貴公〉開頭所說的，此德目就是在天子達成養身之後所要向天下實踐的目標。《呂氏春秋》的作者藉以「至公」一詞概念來讚美堯舜的禪讓行為。按照如此理路，剛登上天子後第一件要做的事情在理論上將會變成要放棄君位。如此，《呂氏春秋》的「公」概念在其實踐上存在著相當難緩的思想張力。

This article, based on the author’s previous research on the concept of li (principle) found in the Book of Xunzi and Mr. Lü’s Spring and Autumn Annals, attempts to elucidate the meanings and roles assigned to the concept of gong (fairness/impartiality) in the thoughts of these two political treatises. While the previous article had demonstrated that the concept of li in the Xunzi and Mr.Lü’s Spring and Autumn Annals provided their theories with a core principle for which the socio-political order could build an empire to cover the world-wide scale of its territory, this article tries to show that the concept of gong mainly functioned to manifest this principle in the realm of the actual policies for ruling the people of the world. More concretely, the main theoretical function of Xunzi’s concept of gong can be found in his argument that the principle for a socio-political order which had initially been embodied by the ancient sage rulers, became accessible to middle ruling-class people called “shi” (officer-aspirants) as a practicable virtue. In this line of argument, Xunzi had even regarded gong as a virtue to be practiced by ordinary subjects. In contrast, the concept of gong in the thought of Mr. Lü’s Spring and Autumn Annals remained as a virtue to rather be practiced by the ruler himself. As is shown in the argument of the “Guigong” chapter, it was a virtue that the Son of Heaven would have to put into practice for the people of the world just after attaining the nourishment of his body. On the other hand, the argument in the “Guigong” chapter went one step further: its author even applauded the abdication of the throne by sage rulers Yao and Shun. Such an argument ironically meant that the first thing to be done after someone succeeded to the throne was to yield it (to the wisest person in the empire). In this point, the concept of gong in the political philosophy of Mr. Lü’s Spring and Autumn Annals contained more or less a thorny tension between its fulfillment and its results.