He's a werewolf! That's why he's been missing classes!

Harry: This book belongs to Harry Potter. Ron: Shared by Ron Weasley, because his fell apart. Hermione: Why don't you buy a new one then? Ron: Write on your own book, Hermione. Hermione: You bought all those dungbombs on Saturday. You could have bought a new book instead. Ron: Dungbombs rule.

For a split second, Harry thought how absurd it was for Tonks to expect the dummy to hear her talking that quietly through a sheet of glass, when there were buses rumbling along behind her and all the racket of street full of shoppers. Then he reminded himself that dummies could not hear anyway.

Oh you is a bad elf, Dobby!

For future reference, Harry, it is raspberry...although of course, if I were a Death Eater, I would have been sure to research my own jam preferences before impersonating myself.

Failure means a stripping away of the inessential.

Professor, why couldn't we just Apparate directly into your old colleague's house?' 'Because it would be quite as rude as kicking down the front door,' said Dumbledore. 'Courtesy dictates that we offer fellow wizards the opportunity of denying us entry.