I have 1,000 words to convince you to celebrate Christmas—or, as someone on Facebook recently put it, “The Jesus Myth.” Right. I could try to convince you that Christmas is a fully Christian celebration, having nothing to do with supposed appropriations of pagan festivals, but that presumes that you care about celebrating Christmas as Christian in the first place. What I need to do is convince you that the myth matters as a myth. This is not a comfortable thought for many modern Christians, accustomed as we are to the accusation that we worship a fairy-tale sky god. If you...