“Voldemort is my past, present and future, Harry Potter …”

Tom Riddle (Diary), Chamber of Secrets, Ch. 17

“You think I was going to use my filthy Muggle Father’s name forever? I, in whose veins runs the blood of Salazar Slytherin himself, through my mother’s side? I, keep the name of a foul, common Muggle, who abandoned me even before I was born, just because he found out his wife was a witch? No, Harry. I fashioned myself a new name, a name I knew wizards everywhere would one day fear to speak, when I had become the greatest sorcerer in the world!”

Tom Riddle (Diary), Chamber of Secrets, Ch. 17

“Kill the spare.”

Voldemort, Goblet of Fire, Ch. 32

“I can make things move without touching them. I can make animals do what I want them to do, without training them. I can make bad things happen to people who annoy me. I can make them hurt if I want to.”

Young Tom Riddle, Half-Blood Prince, Ch. 13

“Greatness inspires envy, envy engenders spite, spite spawns lies. You must know this, Dumbledore.”

Voldemort, Half-Blood Prince, Ch. 20

“I have been careless, and so have been thwarted by luck and chance, those wreckers of all but the best laid plans. But I know better now. I understand those things that I did not understand before. I must be the one to kill Harry Potter, and I shall be.”

Voldemort, Deathly Hallows, Ch. 1

“Perhaps you already know it? You are a clever man, after all, Severus. You have been a good and faithful servant, and I regret what must happen … The Elder Wand cannot serve me properly, Severus, because I am not its true master. The Elder Wand belongs to the wizard who killed its last owner. You killed Albus Dumledore. While you live, Severus, the Elder Wand cannot be truly mine … It cannot be any other way. I must master the wand, Severus. Master the wand, and I master Potter at last … (to Nagini) Kill … I regret it.”

Voldemort, Deathly Hallows, Ch. 32