According to Madam Pomfrey, thoughts could leave deeper scars than almost anything else.

Er — have the Bludgers ever killed anyone?” Harry asked, hoping he sounded offhand. “Never at Hogwarts. We’ve had a couple of broken jaws but nothing worse than that. You don’t have to worry about the Quaffle or the Bludgers —” “— unless they crack my head open.” “Don’t worry, the Weasleys are more than a match for the Bludgers — I mean, they’re like a pair of human Bludgers themselves.

Why were you lurking under our window?" "Yes - yes, good point, Petunia! What were you doing under our windows, boy?" "Listening to the news," said Harry in a resigned voice. His aunt and uncle exchanged looks of outrage. "Listening to the news! Again?" "Well, it changes every day, you see," said Harry.

Read a lot. Reading really helps. Read anything you can get your hands on.

You're a prefect? Oh Ronnie! That's everyone in the family!" "What are Fred and I? Next door neighbors?

Only the difference between truth and lies, courage and cowardice.

I must admit, Peter, I have difficulty in understanding why an innocent man would want to spend twelve years as a rat.