Gregory Maguire said this quote

She had that look a child has only a few times in its life, when the child has bettered her betters. The expression isn't smug, though adults often take it for smugness. It's something else. Maybe relief at having confirmed through personal experience the long-held suspicion of our species, that the enchanted world of childhood is merely a mask for something else, a more subtle and paradoxical magic.- p. 157