“Every curse has a blessing and every blessing has a curse. When you stand face to face with your destiny, will you be able to tell one from the other?”

“Every blessing ignored becomes a curse.”

“Mad Eye' Moody on the Avada Kedavra curse: "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.”

“I speak now, Harry Potter, directly to you. You have permitted your friends to die for you rather than face me yourself. I shall wait for one hour in the Forbidden Forest. If, at the end of that hour, you have not come to me, have not given yourself up, then battle recommences. This time, I shall enter the fray myself, Harry Potter, and I shall find you, and I shall punish every last man, woman, and child who has tried to conceal you from me. One hour.”

“We create our own reality. The blessing (or problem) with this is that when one creates one's own reality, one must live it! Are you living a blessing or is it a curse?”

“Harry uttered an inarticulate yell of rage: In that instant, he cared not whether he lived or died. Pushing himself to his feet again, he staggered blindly toward Snape, the man he now hated as much as he hated Voldemort himself —“Sectum — !”Snape flicked his wand and the curse was repelled yet again; but Harry was mere feet away now and he could see Snape’s face clearly at last: He was no longer sneering or jeering; the blazing flames showed a face full of rage. Mustering all his powers of concentration, Harry thought, Levi —“No, Potter!” [...] Snape’s pale face, illuminated by the flaming cabin, was suffused with hatred just as it had been before he had cursed Dumbledore.“You dare use my own spells against me, Potter? It was I who invented them — I, the Half-Blood Prince! And you’d turn my inventions on me, like your filthy father, would you? I don’t think so . . . no!”

“I remember every wand I’ve ever sold, Mr. Potter. Every single wand. It so happens that the phoenix whose tail feather is in your wand, gave another feather — just one other. It is very curious indeed that you should be destined for this wand when its brother — why, its brother gave you that scar.”