Experience has taught me that the less satisfying the narrative of the day has been, the more likely I am to be unable to let it go. My body keeps me awake until my mind has sculpted something more shapely from the day or I am able to distract it with a more engaging narrative borrowed from the pages of a book. The vigilance of the waking hours is over but so is the magic lantern of event. No matter how glad I am to sink into unconsciousness, this always feels like a loss. Children, who are in so many ways more fully alive than us, understand this intuitively, I think. It’s a rare child who volunteers to go to bed: they too need stories, borrowed narratives to persuade them away from the thrills and puzzles of their own day.