A characteristic scene in a novel like
The Mysteries of Udolpho describes a young heroine who conquers her fears in order to hunt for clues to a mystery—and the scene takes place in an old building at night, by candlelight, while a storm rages outside. Catherine wants both to be scared out of her wits and to keep her wits about her, in imitation of this heroine. She knows it is unlikely that she will uncover the plot of a Gothic novel at Northanger, but she wants to find this plot, so she tries to imagine it into being. When she “accidentally” extinguishes her own candle, forcing herself to toss and turn in terror all night, she gives herself a little of the thrilling fright she craves.