A number of documents contained in this work date back to the twenty-fourth century B.C., and as they are regarded as historical are considered to be of greater importance than are any others of their ancient writings. Second in antiquity and importance is the Shih or the Book of Poetry. This work contains the religious views of its writers, also an account of the manners, customs, and events of the times to which they belong. For 5000 years, in China, Tien or Ti has expressed the moving or creating force in the universe. In later ages it is observed that this name has been attached to royalty. Hwang Ti is the present title of the Emperor of China. From some of the texts found in the Shu King, it would seem that the Chinese had in the remote past caught sight of the scientific fact that virtue is its own reward. "Heaven graciously distinguishes the virtuous.... Heaven punishes the guilty."(116) 116) Max Muller, Sacred Books of the East, book iv. The principal object of Confucius seems to have been to inculcate those doctrines of his ancestors which, taking root, would in time bring about a return to those principles of former virtue, a faint knowledge of which seems still to have survived in China. The following precepts are found among his teachings: "Knowledge, magnanimity, and energy are the virtues universally binding. Gravity, generosity of soul, sincerity, earnestness, and kindness constitute perfect virtue. Sincerity is the very way to Heaven. My doctrine is that of an all-pervading unity. The superior man is catholic and not partisan. The mean is partisan and not catholic. The superior man is affable but not adulatory, the mean is adulatory but not affable." When asked for a word which should serve as a rule of practice for all our life he replied: "Is not Reciprocity such a word? What you do not want done to yourself, do not do to others." On one occasion the question was asked him: "What do you say concerning the principle that injury shall be recompensed with kindness?" To which he replied: "Recompense injury with justice, and recompense kindness with kindness."(117) 117) Lun Yu, xiv., 26.