Why do people suddenly feel sad at the happiest moments? Because the brain anticipates in advance: this moment cannot last forever. What truly causes pain is not the moment of loss itself, but the anticipation of losing while still in possession. Therefore, many people instinctively think: if only happiness could stay forever. But the problem is, once an experience becomes eternal, it quickly loses its excitement and eventually becomes background noise. In fact, people can't stand losing, nor can they tolerate "unchanging." So the so-called "possession" is never about permanent ownership, but about truly experiencing it. The happiness of that one minute doesn't become fake just because it ends later; it has already fulfilled its meaning. Many people's pain comes from always trying to turn "experience" into "permanence," but the logic of life is exactly the opposite: because everything will end, people can continuously feel new moments.