Zi-gong was a very important disciple of Confucius. Many of Confucius' significant concepts of self-cultivation and managing political affairs were revealed because of Zi-gong's question raising. Confucius deemed Zi-gong as a rough diamond. Therefore, Confucius gave him a hint often with the purpose of wanting him to be interlinked upward with Dao. Zi-gong was clever and bright with the power of understanding, and had an insight into the affairs of the world; he was actually a rare talent of entering politics. He had a flexible thought and was keenly observant; hence, he was precise to predict things. This kind talent that can be practically used in the society is hard to come by from ancient time to present; actually he had great deeds to benefit the country and the people. The manifestation of this kind of appearance of life has a certain value by itself, and should not be neglected.Among the four branches of Confucius, Zi-gong was famous for language. He could use skillful language to explore and seek for Confucius' intention, interrogated persistently to get at the bottom of principles, and brought the art of language expression into full play. As for his eloquence, it was mainly displayed at its diplomatic language. He socialized with high-ranking government officials of big countries, talked with confidence and composure, and he could considerably influence the political situation at that time. However, although Zi-gong understood Confucius' erudition and character very much, he could not thoroughly understand Confucius' wisdom on morality; hence, he could not inherit the Confucian orthodoxy. Yet he spared no efforts whether on enhancing and glorifying Confucius' morality as saint or reversing and correcting others' misunderstanding of Confucius, and expressed his complete sincerity of respecting his teacher everywhere.Zi-gong was a person of outstanding ability, and Confucius had deep expectation on him; hence, Confucius conducted stricter training on him; whether answering his question or giving a hint actively, Confucius' purpose was to enable him to reach further achievement. Since he accepted the education in the school of a saint, he did not have a deficit on morality in general direction, he could establish his own character, and he had especially deep realization of correcting his errors and making a fresh start, as well as getting rid of evil. The consistent principle of Confucius' teachings can be represented in one word, namely Jen (Benevolence). Although Zi-gong followed Confucius for a long period of time, he did not have clear consciousness of Jen (Benevolence). Because he did not comprehend the true meaning of Jen (Benevolence), there was naturally a barrier to the connotation of the moral nature or Dao for him.