I radiate confidence and positivity.

Watch a kitchen at half past seven on a Friday. An order is wrong, a fryer has gone down, and there is always one person whose voice doesn't change pitch. Everyone works better within a few feet of that person.

What spreads isn't cheerfulness but steadiness — the sense that nothing here has become an emergency yet. You give it off whether or not you intend to, in a queue, on a call, at somebody's kitchen table. Not by feeling confident. By staying at your own pace while the room speeds up.