Ah, Harry, how often this happens, even between the best of friends! Each of us believes that what he has to say is much more important than anything the other might have to contribute!

HARRY, THIS IS NO TIME TO BE A GENTLEMAN!" Wood roared as Harry swerved to avoid collision. "KNOCK HER OFF HER BROOM IF YOU HAVE TO!

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.

There are those who'll turn innocent occasions to their advantage.

Fred, you next," the plump woman said. "I'm not Fred, I'm George," said the boy. "Honestly, woman, you call yourself our mother? Can't you tell I'm George?" "Sorry, George, dear." "Only joking, I am Fred," said the boy and off he went.

Imperfect understanding is often more dangerous than ignorance.

You are determined to hate him [Snape], Harry,” said Lupin with a faint smile. “And I understand; with James as your father, with Sirius as your godfather, you have inherited an old prejudice. By all means tell Dumbledore what you have told Arthur and me, but do not expect him to share your view of the matter; do not even expect him to be surprised by what you tell him. It might have been on Dumbledore’s orders that Severus questioned Draco.