1. Learn it extensively, interrogate it, think carefully, discern it clearly, and practice it sincerely.

From "Book of Rites· Doctrine of the Mean". We must study extensively and in many aspects; ask questions if we don't understand; think and analyze carefully; distinguish and discuss different opinions clearly; once we understand, we must implement it firmly, steadfastly, and unremittingly. These words talk about the principles of studying, making progress step by step, making continuous progress, and unifying knowledge and action.

2. "Poetry" says: "The clothes are rich and elegant." I hate his writings. Therefore, the way of a gentleman is dark but the sun is up; the way of a villain is dark but the sun is destroying.

From "The Doctrine of the Mean·Right Mind". The Book of Songs says, "Wear gorgeous brocade clothes with a pullover over them." This is to prevent the gorgeous clothes from being too revealing. Therefore, a gentleman's way of life is to be calm on the outside, but his inner virtues become increasingly obvious; a villain's way of life is to be beautiful on the outside, but become increasingly dim as time goes by.

3. Everything will be established if it is hesitated, and it will be wasted if it is not hesitated. If you are determined before you speak, you will not be confused; if you are determined beforehand, you will not be trapped; if you are determined before you act, you will not feel guilty; if you are determined before the road is over, you will not be exhausted.

From "Book of Rites· Doctrine of the Mean". Yu: Same as "pre", beforehand. Waste: corrupt. 跲: stumble; blockage. Whatever you do, it is easy to succeed if you are prepared, and you will fail if you are not prepared. If you think before you speak, you will not get stuck; if you prepare before you do something, you will not encounter difficulties; if you are prepared before you act, you will not regret it; if you choose the road in advance, you will not be cornered.

4. A gentleman does not feel guilty when he introspects, and has no evil intentions. What is beyond the reach of the king, is it invisible to others?

From "The Doctrine of the Mean·Right Mind". Translation: When a gentleman examines himself in his heart, he will have no faults and guilt, and no evil thoughts will exist in his mind. The reason why a gentleman's virtue is higher than that of ordinary people is probably because he is strict with himself even when others cannot see it.

5. A gentleman is wary of what he does not see, and afraid of what he does not hear. Don't see what's hidden, don't show what's subtle, so a gentleman should be cautious about being alone.

From "Book of Rites· Doctrine of the Mean". A gentleman should be cautious and respectful when he is not seen by others, and be alert and fearful when he is not heard by others. There is nothing secret and subtle in the world that will not be revealed, so a gentleman should be cautious even when he is not heard by others. When acting alone without supervision, they will behave cautiously and solemnly. These words point out that a well-educated gentleman should not only pay attention to his behavior in public, but also be more careful and careful when alone.

6. Zhongye is the foundation of the world; harmony is the way of the world; Zhonghe means the place of heaven and the development of all things.

From "Book of Rites· Doctrine of the Mean". Moderation is the foundation for the unity of all people in the world, and harmony is the principle that all people in the world follow. When a state of harmony is achieved, heaven and earth will be in their proper place, and all things will grow and develop without deliberate effort.