"(..) Why do you think she's scared of anything? She's a grown-up, isn't she? Grown-ups and monsters aren't scared of things."
"Oh, monsters are scared, " said Lettie. "And as for grown-ups..." She stopped talking rubbed her freckled nose with a finger. Then, "I'm going to tell you something important. Grown-ups don't look like grown-ups on the inside either. Outside they're big and thoughtless and they always know what they're doing. Inside they look just like they always have. Like they did when they were your age. The truth is, there aren't any grown-ups. Not one, in the whole wide world."

(Neil Gaiman "The Ocean at the End of the Lane")