Harry, despite your privileged insight into Voldemort’s world (which, incidentally, is a gift any Death Eater would kill to have), you have never been seduced by the Dark Arts, never, even for a second, shown the slightest desire to become one of Voldemort’s followers!” “Of course I haven’t!” said Harry indignantly. “He killed my mum and dad!” “You are protected, in short, by your ability to love!” said Dumbledore loudly.

Yeah, well, food's one of the five exceptions to Gamp's Law of Elemental Transfigurations," said Ron, to general astonishment.

If you have to ask, you’ll never know. If you know, you need only ask.

Or perhaps in Slytherin, you'll make your real friends. Those cunning folk use any means to achieve their ends.

One can never have enough socks," said Dumbledore. "Another Christmas has come and gone and I didn't get a single pair. People will insist on giving me books.

And that boys," yelled Mr. Weasley over the tumult of the crowd below,"is why you should never go for looks alone!

He chose the boy he thought most likely to be a danger to him," said Dumbledore. And notice this, Harry. He chose, not the pureblood (which, according to his creed, is the only kind of wizard worth being or knowing), but the half-blood, like himself. He saw himself in you before he had ever seen you, and in marking you with that scar, he did not kill you, as he intended, but gave you powers, and a future, which have fitted you to escape him not once, but four times so far — something that neither your parents, nor Neville’s parents, ever achieved.