Meeting each other is like knowing each other for the first time, and there will be no resentment until the end of time.

If people behave as if they had just met each other every time (they are polite and courteous to each other), then even if they get along until old age, there will never be any resentment towards each other.

Most people are more polite and reserved when they first get to know each other. Once they become familiar with each other, they tend to be careless and careless, leading to discord or even falling out. Therefore, these two sentences advise people to always pay attention to etiquette, enthusiasm and consistency when getting along with each other.

You know the nature of fish when you are near the water, and you know the sounds of birds when you are near the mountains.

If you stay close to the water for a long time, you will understand the habits of the fish in the water; if you stay close to the mountains and forests, you will understand the habits of the birds in the forest.

These two sentences mean that no matter you spend a long time with something, you will understand its habits.

When looking at the present, it is advisable to learn from the past, as the present cannot be achieved without the past. When observing today's society, we should learn from history. Without history, there would be no present. These two sentences mean that we should learn more about history and learn from the successes and failures in history to guide our current work. Emphasized the importance of learning from history.

Know yourself and your enemy, and compare your feelings with your own. Understand yourself and the other person. Put yourself in front of others, change your perspective, and consider the problem from the other person's point of view. These two sentences emphasize that we must be good at looking at problems from the other party's perspective, understand the other party, and understand the other party. If you can do this, many doubts may suddenly become clear.