You can afford to offend 90% of the people around you.
In interpersonal communication, the most important thing is the sense of boundary. In fact, the value is second, because the value is too subtle, and the sense of boundary requires you to practice deliberately.
Most people always have a tendency to please others, and the education we have received since childhood is to be humble, more is not as good as less, but people are also a very strange creature, the lower your sense of boundaries, others will not treat you more kind, but more unscrupulously invade your private territory, and the more obvious your boundaries, they will give you the respect you deserve.
Ninety percent of the people around you belong to this kind of “strange” people, and the rest, a small number of people who can easily crush you, actually have no time to talk to you!