You notice the emotional weather before anyone names it — the friend who went quiet, the joke that landed wrong. You approach feelings the way a student approaches a subject they actually love: openly, without pretending to be finished learning. People tell you things they have not told anyone.
The cost is skin. Taking everything in means everything gets in, including what was aimed at someone else. You can drown a week in a mood you absorbed secondhand, and your openness gets mistaken for naivety by people who measure depth in cynicism.
The Page of Cups holds the cup out, not close — that is the whole art. Keep the openness and add a floor to stand on: not every feeling that visits you deserves a room. The wonder is the gift; the boundary is the skill.