CONSTANT VIGILANCE!!!

You need preparing. You need arming. But most of all, you need constant, never ceasing vigilance (p. 217).

'Course Dumbledore trusts you. He's a trusting man, isn't he? Believes in second chances. But me—I say there are spots that don't come off, Snape. Spots that never come off, d'you know what I mean? (p. 472)

"Pajama party is it?"

'Not nice,' he said calmly. 'Not pleasant. And there's no counter-curse. There's no blocking it. Only one known person has ever survived it, and he's sitting right in front of me.'

Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.

Really, Hagrid, if you are holding out for universal popularity, I'm afraid you will be in this cabin for a very long time.

My own brother, Aberforth, was prosecuted for practicing inappropriate charms on a goat. It was all over the papers, but did Aberforth hide? No, he did not! He held his head high and went about his business as usual! Of course, I'm not entirely sure he can read, so that may not have been bravery...

You are blinded (...) by the love of the office you hold, Cornelius! You place too much importance, and you have always done, on the so-called purity of blood! You fail to recognize that it matters not what someone is born, but what they grow up to be!