the heart, and be the natural outgrowth of internal sincerity. 'As a man thinketh in his heart, so is he.' This is the teaching alike of Solomon and the author of the Great Learning. Fourth. I mention last the striking exhibition which we have of the golden rule, though only in its negative form:-- 'What a man dislikes in his superiors, let him not display in the treatment of his inferiors; what he dislikes in inferiors, let him not display in his service of his superiors; what he dislikes in those who are before him, let him not therewith precede those who are behind him; what he dislikes in those who are behind him, let him not therewith follow those who are before him; what he dislikes to receive on the right, let him not bestow on the left; what he dislikes to receive on the left, let him not bestow on the right. This is what is called the principle with which, as with a measuring square, to regulate one's conduct [1].' The Work which contains those principles cannot be thought meanly of. They are 'commonplace,' as the writer in the Chinese Repository calls them, but they are at the same time eternal verities. l Comm. x. a. CHAPTER IV. THE DOCTRINE OF THE MEAN. SECTION I. ITS PLACE IN THE LI CHI, AND ITS PUBLICATION SEPARATELY. 1. The Doctrine of the Mean was one of the treatises which came to light in connexion with the labors of Liu Hsiang, and its place as the thirty-first Book in the Li Chi was finally determined by Ma Yung and Chang Hsuan. In the translation of the Li Chi in 'The Sacred Books of the East' it is the twenty-eighth Treatise. 2. But while it was thus made to form a part of the great collection of Treatises on Ceremonies, it maintained a separate footing of its own. In Liu Hsin's Catalogue of the Classical Works, we find 'Two p'ien of Observations on the Chung Yung [l].' In the Records of the dynasty of Sui (A.D. 589-618), in the chapter on the History of Literature [2], there are mentioned three Works on the Chung Yung;-- the first called 'The Record of the Chung Yung,' in two chuan, attributed to Tai Yung, a scholar who flourished about the middle of the fifth century; the second, 'A Paraphrase and Commentary on the Chung Yung,' attributed to the emperor Wu (A.D. 502-549) of the Liang dynasty, in one chuan ; and the third, 'A Private Record, Determining the Meaning of the Chung Yung,' in five chuan, the author, or supposed author, of which is not mentioned [3]. It thus appears, that the Chung Yung had been published and commented on separately, long before the time of the Sung dynasty. The scholars of that, however, devoted special attention to it, the way being led by the famous Chau Lien-ch'i [4]. He was followed by the two brothers Ch'ang, but neither of them published upon it. At last came Chu Hsi, who produced his Work called 1 中庸說二篇. 2 隋書,卷三十二,志第二十七,經籍,一, p. 12. 3 禮記中庸專,二卷,宋散騎常侍戴顒撰;中庸講疏,一卷,梁武帝撰;私記制旨中庸; 五卷. 4 周濂溪.