Is it true that you shouted at Professor Umbridge?"
"Yes."
"You called her a liar?"
"Yes."
"You told her He Who Must Not Be Named is back?"
"Yes."
"Have a biscuit, Potter.

Do you remember me telling you we are practicing non-verbal spells, Potter?"
"Yes," said Harry stiffly.
"Yes, sir."
"There's no need to call me "sir" Professor."
The words had escaped him before he knew what he was saying.

Ah" said Dumbledore gently, "Yes I thought we might hit that little snag!"
"Snag?" said Fudge, his voice still vibrating with joy. "I see no snag, Dumbledore!"
"Well," said Dumbledore apologetically, "I'm afraid I do."
"Oh, really?"
"Well it's just that you seem to be labouring under the delusion that I am going to -- come quietly. I am afraid I am not going to come quietly at all, Cornelius. I have absolutely no intention of being sent to Azkaban. I could break out, of course -- but what a waste of time, and frankly, I can think of a whole host of things I would rather be doing.

DUMBLEDORE'S ARMY, STILL RECRUITING.

When we come face-to-face with one down a dark alley, we're going to be having a shufti to see if it's solid, aren't we, we're not going to be asking, 'Excuse me, are you the imprint of a departed soul?

By all means continue destroying my possessions. I daresay I have too many.