"One of these grand defects, as I humbly conceive, is this, that children are habituated to learning without understanding."

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And there are vampires, too? Werewolves, warlocks, all that stuff?" Clary gnawed her lower lip. "So I hear." "And you kill them, too?" Simon asked, directing the question to Jace, who had put the stele back in his pocket and was examining his flawless nails for defects. "Only when they've been naughty.

— Cassandra Clare