This week saw the world premiere of The Hobbit: An Unexpected Journey, a film telling a story where characters go on ‘a journey’. At the start Bilbo Baggins is just like us, living his ordinary life, but by the end he will have become a hero. As he moves through his journey he is transformed by the challenges he must face. For Bilbo these threats are much more serious than whether his pastry will have a soggy bottom. But that doesn’t mean every...