What do you mean by "out of the middle"?

China and the West have profound meanings and unique cultures, which is the significance of China's ancient ethics. A gentleman keeps his word, but his name is not right. Take the regular road, not the crooked ways. Take the front door when you go out, not the side door, let alone the back door and drill a dog hole.

The word Zhong Chu comes from the Book of Rites. The original text is as follows:

Joy comes from it, and courtesy comes from outside. Joy comes from the middle, so it is quiet, and courtesy comes from the outside.

If you want to have fun, you should leave it, but it is polite to leave it. And because you want to be happy, you have to get out of it, so you have to do it quietly so that you won't be found. As for coming out, it is very polite and gentle. Some people are out, some people have to be out ... what is possessed (always suffering)?