Good interpersonal relationships begin with the relationship between husband and wife. Harvard University's happiness study lasted 75 years, studied 724 people, and lasted more than 2,000 people. It cost more than 20 million US dollars. Conclusion, success is built on happiness - human connection - harmony as a couple.

The way of a gentleman is easy and hidden. The stupidity of a couple can be traced to knowledge, but even a sage will not know something even if it is so extreme. A husband and wife can be unfaithful, but to the extreme, even a sage cannot do anything about it. The world is so big that people still have regrets. Therefore, if a gentleman's words are big, nothing in the world can carry them; if his words are small, nothing in the world can break them. "Poetry" says: "Kites fly to the violent sky, fish leap into the abyss." It is said that it can be observed up and down. The way of a gentleman starts with the husband and wife, and when it reaches its end, it reaches the heaven and the earth. (Chapter 12)

The way of a gentleman is broad yet subtle. Ordinary men and women, although ignorant, can still know the way of a gentleman; but its highest and most profound realm, even saints cannot figure it out; ordinary men and women, although they are not wise, can still practice the way of a gentleman, but its highest and most profound realm, even if There are things that even a saint cannot do. The earth is so big, but people still have areas that they are not satisfied with. Therefore, when a gentleman talks about "big", he means it is so big that the whole world cannot contain it; when a gentleman talks about "small", it means it is so small that it cannot be separated even a little bit. "The Book of Songs" says: "Kites fly to the sky, fish jump into the deep water." This means that there is a clear distinction between up and down. The way of a gentleman begins with ordinary men and women, but its highest and most profound state is known throughout the world.

Grannies in the countryside can warmly entertain guests when they see them, but graduate and doctoral students may not be able to do so. Not a single chicken is lost in the countryside. Carrying a burden to sell things means borrowing all the money. You are infinite light, lend me a little light. Come out to sell things at 4pm every day. More trustworthy than the big boss.

Nothing in the world can contain it: The connotation of a gentleman improving people’s inner saintliness and outer king’s clarity of mind and nature cannot be given by heaven and earth. The merits of a gentleman are beyond the reach of heaven and earth. A gentleman's mind can prove it, and all things in the world can realize it. The thought of seeing the truth is very small and fleeting, but it cannot be destroyed by the world. Realization does not change, belief does not change.

Observe up and down, observe the metaphysical and metaphysical, observe your own hidden thoughts and thoughts.

The way of a gentleman begins with the couple. Observe the heaven and the earth.