Many people easily feel pain and internal conflict because they overestimate the existence of "humans" and forget that the fundamental nature of everyone is animalistic. The instinct of animals is to act driven by desire, maximize benefits, and minimize risks. The relationships between people may seem calm on the surface, but impulses, desires, and interests are always surging in the background. If you imagine people to be too kind and relationships to be too pure, then even a small calculation or indifference in reality can be enough to leave you utterly disappointed. True clarity is not about living in an idealized world, but about daring to acknowledge and confront the dark sides of human nature and relationships. Only in this way can you neither be consumed by it nor be repeatedly hurt by the gap in expectations.