“Young people are so infernally convinced that they are absolutely right about everything.”

“This is precisely why I loathed being a teacher! Young people are so infernally convinced that they are absolutely right about everything. Has it not occurred to you, my poor puffed-up poppinjay, that there might be an excellent reason why the Headmaster of Hogwarts is not confiding every tiny detail of his plans to you? Have you never paused, while feeling hard-done-by, to note that following Dumbledore's orders has never yet led you into harm? No. No, like all young people, you are quite sure that you alone feel and think, you alone recognise danger, you alone are the only one clever enough to realise what the Dark Lord may be planning.”

“Their reward for enduring the awful experience was the right to tell people about it.”

“The presence of hundreds of books had finally convinced Hermione that what they were doing was right.”

“You never get it right, you people, do you? Either we've got Fudge, pretending everything's lovely while people get murdered right under his nose, or we've got you, chucking the wrong people into jail and trying to pretend you've got 'The Chosen One' working for you!”

“Failure is so important. We speak about success all the time. It is the ability to resist failure or use failure that often leads to greater success. I've met people who don't want to try for fear of failing.”

“Dumbledore says people find it far easier to forgive others for being wrong than being right.”