“Once again you've put your keen and penetrating mind to the task and as usual come to the wrong conclusion!”
“Then you will find yourself easy prey for the Dark Lord!" said Snape savagely. "Fools who wear their hearts proudly on their sleeves, who cannot control their emotions, who wallow in sad memories and allow themselves to be provoked so easily - weak people, in other words - they stand no chance against his powers! He will penetrate your mind with absurd ease, Potter!”
“Or yet in wise old Ravenclaw, if you've a ready mind, Where those of wit and learning, Will always find their kind.”
“Once again, you show all the sensitivity of a blunt axe.”
“Once again I must ask too much of you, Harry.”
“Don't put your wand there, boy! What if it ignited? Better wizards than you have lost buttocks, you know.""Who d'you know who's lost a buttock?""Never you mind...”
“Because, sometimes you've got to think about more than your own safety! Sometimes you've got to think about the greater good! This is war!”