Harry Potter and the Prisoner of Azkaban
How we cite our quotes:
"The charm that repels a boggart is simple, yet it requires force of mind. You see, the thing that really finishes a boggart is laughter. What you need to do is force it to assume a shape that you find amusing." (7.2.37)
That cliché about laughter being the best medicine really is true here. Lupin notes that the anti-boggart charm requires "force of mind," which is interesting. Fear is a largely internal, mental thing that an individual has to fight with his or her own force of mind.
Neville looked around rather wildly, as though begging someone to help him, then said, in barely more than a whisper, "Professor Snape." Nearly everyone laughed. Even Neville grinned apologetically. (7.2.45)
The details about Neville are really vivid here. We can actually see how scared he is, as he looks around desperately before answering Professor Lupin. As Neville demonstrates, sharing your fears can be really embarrassing. So what do you think of Professor Lupin, for making the entire class essentially share their deepest, darkest fears?
But before he had even started to plan a possible counterattack on a boggart-Voldemort, a horrible image came floating to the surface of his mind [...]
A rotting, glistening hand, slithering back beneath a black cloak [...] then a cold so penetrating it felt like drowning [...] (7.2.59-60)
Harry demonstrates a lot of maturity here with his choice of a fear. See, Ron's boggart becomes a giant spider, since he's "afraid" of them. But there are definite levels of fear, and Harry's fear, which literally rises up out of his subconscious, is of an abstract concept (fear itself), something an adult and not a kid would probably be most afraid of. Hermione, too, with her fear of failure, taps into this darker side of growing up, where you stop being afraid of monsters hiding under your bed and start being afraid of things like emotional experiences.