Have you ever considered how powerful a comma is?  This little punctuation mark could very well be the thing that keeps your poor grandmother from becoming the main course of your Christmas dinner.  You can either say, “This Christmas we are having our grandmother for dinner.” Or “This Christmas we are having our grandmother, for dinner.”  In this episode we’ll talk about how a comma can help explain one of the most misunderstood Christmas Carols that we sing at Christmas.