Two persons, if with congenial taste or temper, would like to make friends and make in touch with each other. Otherwise, even two friends would break their friendship, and cut off contact with each other. Among friends, who are more familiar to each other and have a closer relationship than any others, they cannot have no manners but keep ceremonious to each other. Otherwise, they will break their rapport and balance, and even destroy their friendship. Everyone in the world hopes that they have their own private space. If keeping anything at will between each other, they tend to enter their private space, a no-go-area, which easily results in conflict and estrangement with each other. Keeping unceremonious, probably just a trifle, may bury a destructive seed for the friendship. The best way of keeping a close friendship is to keep temperate contacts with each other, and to make non-interference in each other.    -------节选自《听南怀瑾讲<论语>》