"This was the feeling that Ms. Hempel couldn't shake: a conviction that she spent her days among people at the age when they are most purely themselves. How could she not be depleted when she came home, having been exposed for hours, without protection, to all those thrumming radiant selves? Here they were, just old enough to have discovered their souls, but not yet dulled by the ordinary act of survival, not yet practiced in dissembling."