“As though you could use violent, unjust means and achieve peace and justice! Means determine ends; and must be like the ends proposed. Means intrinsically different from the ends proposed achieve ends like themselves, not like those they were meant to achieve.”

“In the end, I must proclaim that no good can be achieved of false means. For the substance of our existence is not in the achievement, but in the method.”

“Or perhaps in Slytherin, you'll make your real friends. Those cunning folk use any means to achieve their ends.”

“What is wisdom? It is the skill to achieve the perfect means by the perfect ends ”

“You think the end justifies the means, however vile. I tell you: the end is the means by which you achieve it. Today's step is tomorrow's life. Great ends cannot be attained by base means. You've proved that in all your social upheavals. The meanness and inhumanity of the means make you mean and inhuman and make the end unattainable.”

“War is not glorious. War is hell. The only reason for fighting it is toachieve some good end that cannot be achieved by any other means.”