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"And power-hungry Slytherin Loved those of great ambition." - Sorting Hat, 'Harry Potter And The Goblet Of Fire'

"It is a curious thing, Harry, but perhaps those who are best suited to power are those who have never sought it. Those who, like you, have leadership thrust upon them, and take up the mantle because they must, and find to their own surprise that they wear it well." — Albus Dumbledore