The superior person is calm and composed; the lesser person is continuously worried and distressed.

The higher type of man clings to virtue, the lower type of man clings to material comfort. The higher type of man cherishes justice, the lower type of man cherishes the hope of favors to be received.

To know, is to know that you know nothing. That is the meaning of true knowledge. When you say something, say what you know. When you don't know something, say you don't know. That is knowledge.

What you know, you know, what you don't know, you don't know. This is true wisdom.

Chi Wen Tzu always thought three times before taking action. Twice would have been quite enough.

Reviewing what you have learned and learning anew, you are fit to be a teacher.

If names be not correct, language is not in accordance with the truth of things.