论语-为政第二09-17

Confucius, speaking of a favorite disciple whose name was Yen Hui, remarked,  "I have talked with him for one whole day, during which he has never raised one single objection to what I have said, as if he were dull of understanding. But when he has retired, on examining into his life and conversation, I find he has been able to profit what I have said to him. No, he is not a man dull of understanding. "

Confucius remarked, " You look at how a man acts; consider his motives; find out his tastes. How can a man hide himself; how can he hide himself from you?"

Confucius remarked, "If a man will constantly go over what he has acquired and keep continually adding to it new acquirements, he may become a teacher of men."

Confucius remarked, "A wise man will not make himself into a mere machine fit only to do one kind of work."

A disciple enquired what constituted a wise and good man. Confucius answered. A wise and good man is one who acts before he speaks, and afterwards speaks according to his actions.

Confucius remarked, "A wise man is impartial, not neutral. A fool is neutral but not impartial."

Confucius remarked, “Study without thinking is labour lost. Thinking without study is perilous.”

Confucius remarked,“To give oneself up to the study of metaphysical theories—that is very injurious indeed.”

Confucius said to a disciple, “Shall I teach you what is understanding? To know what it is that you know, and to know what is that you do not know, –that is understanding.”