"Professor, why couldn't we just Apparate directly into your old colleague's house?' 'Because it would be quite as rude as kicking down the front door,' said Dumbledore. 'Courtesy dictates that we offer fellow wizards the opportunity of denying us entry."

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Let's cut to the chase, the sharia controversy. I don't think I, or my colleagues, predicted just how enormous the reaction would be. I failed to find the right words. I succeeded in confusing people. I've made mistakes - that's probably one of them.

— Rowan Williams