“A billboard with a simplistic slogan like AiG’s carries as much ethos, pathos, and logos as a bumper sticker: in other words, not much at all. The difference between a billboard and a bumper sticker, of course, is the latter costs maybe a few dollars whereas the cost of the former is enough to feed many hungry people in need — something that the Jesus I read about in the Bible actually and explicitly commanded his followers to do.”