What's there left to say about Tim Tebow? He's brilliant and appalling, inspiring and annoying - a straightforward young man who somehow played and prayed his way into being the most enigmatic figure in American sports. In the essay-length Kindle Single "The Gospel According to Tim", Joseph Bottum argues that Tebow strikes a nerve because he has slipped beyond all the usual categories of our wink-and-nudge culture of irony. And he's done...