Practice without overstepping the bounds comes from The Analects of Confucius: "Be determined to learn five out of ten, stand at thirty, not be confused at forty, know the destiny at fifty, listen at sixty, and not overstep the bounds at seventy."
Precautions:
No matter what kind of relationship, if you want to maintain it well, you can't do without a sense of boundaries. This is not only a principle that life must follow, but also a prerequisite to measure whether a relationship can last for a long time.
The closer the relationship, the more it is worth maintaining and managing. Especially in the communication of acquaintances, we should pay more attention to caution, avoid touching other people's privacy at will, and don't expose their shortcomings.