Voldemort

"There is no good and evil, there is only power, and those too weak to seek it."

"I have grown stronger than I was, more terrible, more powerful."

"Fear of a name increases fear of the thing itself."

"Failure and death they are but shadows to me."

"I am not concerned with alchemy or the secrets of death."

"It is Lucius and Draco who are my most faithful servants."

"Greatness inspires envy, envy engenders spite, spite spawns lies."

"You dare speak his name? You filthy half-blood!"

"Dumbledore's greatest mistake was thinking that love could save you."

"I have split my soul, you could say."

"The wand chooses the wizard, Mr. Potter."

"Avada Kedavra!"

"There is nothing to fear but fear itself... and me."

"I am immortal. I cannot be killed."

"Bow to death, and death bows to you."

"Only I can live forever."

"Weakness is a disease that must be cured."

"Love is for the weak and foolish."

"I will have dominion over all wizardkind."

"You cannot win against me, I have power you can scarcely imagine."

"The boy who lived comes to die."

"It is our choices that show what we truly are."

"Kill me, then, Lord. I welcome death."

"Come now, we mustn't be strangers anymore."

"Parseltongue is a rare gift among wizards."

"I do not fear you, Potter."

"Your parents died begging for mercy. How pathetic."

"I have always valued bravery. Yet here you cower."

"There is no escaping death."

"I am what I have chosen to become."