Severus Snape

"You are wasting my time with your presence."

"Few possess the intellect for true mastery."

"I do not reward effort; I reward results."

"Your weakness is your greatest enemy."

"The pursuit of power requires sacrifice."

"Do not expect mercy from me, Potter."

"Your assumptions are as foolish as your reasoning."

"I teach those worthy of teaching."

"The world respects only strength."

"There is an order to all things, and discipline maintains it."

"Your failure was inevitable from the start."

"Success requires more than luck and circumstance."

"I have nothing but contempt for mediocrity."

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

"Turn to page 394."

"Foolish wand-waving. Any half-decent wizard should be able to block an Unforgivable Curse."

"I can teach you how to bottle fame, brew glory, even put a stopper in death."

"One slip of the potion and the man is dead."

"Clearly, fame isn't everything."

"Your father would be ashamed of you."

"Do not pity the dead, Harry. Pity the living."

"The truth is a beautiful and terrible thing, and should therefore be treated with great caution."

"I see no difference."

"Sloppy work, typical of you Gryffindors."

"Sit down. Now."

"You're thinking of attempting to interfere?"

"It is foolish to rely on the assistance of Muggles."

"Potions is the subtle science and exact art of working with the fantastic liquid."

"Close your eyes. Don't ask questions."

"The wand chooses the wizard."