Analects 19:6. Tzu-hsia said, "To study extensively, to be steadfast in one's purpose, to inquire earnestly, and to reflect on what is at hand (that is, what one can put into practice)--humanity consists in these."

Analects 19:7. Confucius said, "The hundred artisans work in their works to perfect their craft. The superior man studies to reach to the utmost of the Way."

Analects 19:11. Tzu-hsia said, "So long as man does not transgress the boundary line in the great virtues, he may pass and re-pass it in the small virtues."

Analects 19:13. Tzu-hsia said, "A man who has energy to spare after studying should serve his state. A man who has energy to spare after serving his state should study."

Analects 19:24. Shu-sun Wu-shu slandered Chung-ni (Confucius). Tzu-kung said, "It is no use. Chung-ni cannot be slandered. Other worthies are like mounds or small hills. You can still climb over them. Chung-ni, however, is like the sun and moon that cannot be climbed over. Although a man may want to shut his eyes to the sun and the moon, what harm does it do to them? It would only show in large measure that he does not know his own limitations."