1. If his body is upright, he will not do what he is told; if his body is not upright, he will not do what he is told.

2. When three of us travel together, we must be our teacher. Choose the good ones and follow them, and change the bad ones. Explanation: Several people are walking together, and one of them must be my teacher. You should choose their strengths to learn from, and pay attention to correcting their shortcomings

3. Among three people, there must be a teacher; choose the good ones and follow them, and change the bad ones.

4. The master is gentle, kind, respectful, frugal, and generous in order to get it. What is the Master's pursuit of? Is it different from what others seek? Source: "The Analects of Confucius"

5. Look ahead, suddenly look behind. Master is always good at seducing people. He persuades me with words and invites me with courtesy. Explanation: (For the teacher’s knowledge and morality), I looked up, and the more I looked, the higher I felt; I studied hard, and the more I studied, the more inexhaustible I felt. It seems to be in front, and suddenly it seems to be behind. The teacher was good at guiding me step by step, using various classics to enrich my knowledge, and using various etiquette to restrain my words and deeds, making it impossible for me to stop learning until I exhausted all my strength.

6. Lao Tzu is knowledgeable about the past and present, understands the source of ritual and music, and understands the return of morality. He is indeed a good teacher for me. At the same time, he also used metaphors to praise Lao Tzu. He said: Birds, I know they can fly; fish, I know they can swim; beasts, I know they can run. I can build a net to catch wild beasts that are good at running. I can catch swimming fish by tying silk strips to hooks. I can shoot down high-flying birds with good arrows. As for the dragon, I don't know how it rides the wind and clouds to the sky. Lao Tzu, he is like a dragon evil.

7. If you review the past and learn the new, you can become a teacher. Meaning: Review old knowledge to gain new understanding and experience. With this, you can become a teacher. There are four interpretations of "reviewing the past and learning the new". The first is "reviewing the past to learn the new", reviewing the knowledge you have learned and gaining new insights from it; the second is "reviewing the past and learning the new": on the one hand, you must review the classics and stories, and on the other hand, you must strive to acquire new knowledge. The third is to review the past and learn the new. As your experience becomes richer and your understanding improves, you can always learn more from it when you look back at the knowledge you have read before.