J.K. Rowling

You think the dead we loved ever truly leave us? You think that we don't recall them more clearly than ever in times of great trouble?

The consequences of our actions are always so complicated, so diverse, that predicting the future is a very difficult business indeed.

I'm not blamin' yeh … but I gotta tell yeh, I thought you two'd value yer friend more'n broomsticks or rats. Tha's all.

And they didn't desert me at all. Instead, they did something for me that would make my transformations not only bearable, but the best times of my life. They became Animagi.

THEN YOU SHOULD HAVE DIED! DIED RATHER THAN BETRAY YOUR FRIENDS, AS WE WOULD HAVE DONE FOR YOU!

Well, you look in excellent health to me, Potter, so you'll excuse me if I don't let you off homework. I assure you that if you die, you need not hand it in.

When a wizard goes over ter the Dark Side there's nothin' and no one matters to 'em anymore.…

'One can never have enough socks,' said Dumbledore.

What happened down in the dungeons between you and Professor Quirrell is a complete secret, so, naturally, the whole school knows. I believe your friends Misters Fred and George Weasley were responsible for trying to send you a lavatory seat.

'There are all kinds of courage,' said Dumbledore, smiling. 'It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends. '

Humans do have a knack for choosing precisely those things which are worst for them.

'Harry — you're a great wizard, you know.'

'I'm not as good as you,' said Harry, very embarrassed, as she let go of him.

'Me!' said Hermione. 'Books! And cleverness! There are more important things — friendship and bravery and — oh Harry — be careful!'