Why is it said that when interacting with someone, it's not about what they can give you, but what they possess? Because a person's boundaries often come from what they are afraid of losing. Someone with a career cares about the future, someone with a reputation cares about evaluations, someone with a family cares about responsibilities, and someone with credit cares about long-term relationships. These are constraints as well as costs. Conversely, a person without accumulation, reputation, or long-term plans may not necessarily do evil, but their behavior is often harder to predict because they have less to lose. Therefore, the essence of high-quality relationships has never been resource exchange, but risk screening. The most precious trust between people is not how much benefit the other can give you, but the fact that you know: even when facing benefits, they still have reasons not to harm you.