Because the people who are crazy enough to think they can change the world, are the ones who do.
“I don’t think you should be an Auror, Harry,“ said Luna unexpectedly. Everybody looked at her. “The Aurors are part of the Rotfang Conspiracy, I thought everyone knew that. They’re working to bring down the Ministry of Magic from within using a mixture of dark magic and gum disease.”
Welcome to a new year at Hogwarts! Before we begin our banquet, I would like to say a few words. And here they are: Nitwit! Blubber! Oddment! Tweak!