Voldemort uses people his enemies are close to. He's already used you as bait once, and that was just because you're my best friend's sister. Think how much danger you'll be in if we keep this up. He'll know, he'll find out. He'll try and get to me through you.

You are here to learn the subtle science and exact art of potion-making. As there is little foolish wand-waving here, many of you will hardly believe this is magic. I don't expect you will really understand the beauty of the softly simmering cauldron with its shimmering fumes, the delicate power of liquids that creep through human veins, bewitching the mind, ensnaring the senses. . . I can teach you how to bottle fame, brew glory, even stopper death — if you aren't as big a bunch of dunderheads as I usually have to teach.

The Potter books in general are a prolonged argument for tolerance, a prolonged plea for an end to bigotry. And I think it's one of the reasons that some people don't like the books, but I think that's it's a very healthy message to pass on to younger people that you should question authority and you should not assume that the establishment or the press tells you all of the truth.

Don't count your owls before they are delivered.

Ah, go boil yer heads, both of yeh", said Hagrid. “Harry — yer a wizard.

You have to be free to fail in this world.

Well?" Ron said finally, looking up at Harry. "How was it?" Harry considered it for a moment. "Wet," he said truthfully. Ron made a noise that might have indicated jubilation or disgust, it was hard to tell. "Because she was crying," Harry continued heavily. "Oh," said Ron, his smile faded slightly. "Are you that bad at kissing?" "Dunno," said Harry, who hadn't considered this, and immediately felt rather worried. "Maybe I am.