“I solemnly swear that I am up to no good.”

“Mischief Managed.”

“Where is Wood?" said Harry, suddenly realizing he wasn't there.
"Still in the showers," said Fred. "We think he's trying to drown himself.”

“He was my mum and dad's best friend. He's a convicted murderer, but he's broken out of wizard prison and he's on the run. He likes to keep in touch with me, though...keep up with my news...check if I'm happy...”

“Sirius — it’s me . . . it’s Peter . . . your friend . . . you wouldn’t . . .”
Black kicked out and Pettigrew recoiled. “There’s enough filth on my robes without you touching them,” said Black.”

“Lily and James only made you Secret-Keeper because I suggested it,” Black hissed, so venomously that Pettigrew took a step backward. “I thought it was the perfect plan... a bluff... Voldemort would be sure to come after me, would never dream they’d use a weak, talentless thing like you... It must have been the finest moment of your miserable life, telling Voldemort you could hand him the Potters.”

“Get off me,” Harry spat, throwing Pettigrew’s hands off him in disgust. “I’m not doing this for you. I’m doing it because — I don’t reckon my dad would’ve wanted them to become killers — just for you.”

I COULD QUOTE THIS ENTIRE SCENE I LOVE IT SO.

“When one wizard saves another wizard’s life, it creates a certain bond between them. And I’m much mistaken if Voldemort wants his servant in the debt of Harry Potter.”
“I don’t want a connection with Pettigrew!” said Harry. “He betrayed my parents!”
“This is magic at its deepest, its most impenetrable, Harry. But trust me, the time may come when you will be very glad you saved Pettigrew’s life.”

“I don't go looking for trouble. Trouble usually finds me.”

“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? Your father is alive in you, Harry, and shows himself plainly when you have need of him. How else could you produce that particular Patronus? Prongs rode again last night.”

“I'll understand, of course, if you want to stay with your aunt and uncle,' said Sirius. 'But...well...think about it. Once my name's cleared...if you wanted a...a different home...'

Some sort of explosion took place in the pit of Harry's stomach. 'What — live with you?' he said, accidentally cracking his head on a bit of rock protruding from the ceiling. 'Leave the Dursleys?'

'Of course. I thought you wouldn't want to' said Sirius quickly. 'I understand. I just thought I'd —'

'Are you mad?' said Harry, his voice easily as croaky as Sirius. 'Of course I want to leave the Dursleys! Have you got a house? When can I move in?”

“I want to commit the murder I was imprisoned for.”

“Bad news, Harry. I've just been to see Professor McGonagall about the Firebolt. She – er, got a bit shirty with me. Told me I'd got my priorities wrong. Seemed to think I cared more about winning the Cup than I do about staying alive. Just because I told her I didn't care if it threw you off, as long as you caught the Snitch first.”

“I'm not going to be murdered," Harry said out loud.
"That's the spirit, dear," said his mirror sleepily.”

“If you made a better rat than a human, it’s not much to boast about, Peter.”

“What you fear most of all is —fear. Very wise...”

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

“Once again you've put your keen and penetrating mind to the task and as usual come to the wrong conclusion!”

“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!”

“Ah, well, people can be stupid abou' their pets," said Hagrid wisely.”

“Prongs rode again last night... You know, Harry, in a way, you did see your father last night... You found him inside yourself.”

“Besides, the world isn't split into good people and Death Eaters. We've all got both light and dark inside us. What matters is the part we choose to act on. That's who we really are.”

"You sometimes have to join forces with those you'd rather avoid.”

“It’s cruel that I got to spend so much time with James and Lily, and you so little. But know this; the ones that love us never really leave us. And you can always find them in here”

“You! You foul loathsome evil little cockroach!”