I realize, as I come to this day which is the end of the Advent season, that I really haven't pondered the nature of Advent as deeply as usual this year.  I am still busy pondering the duality of my human condition. And that awareness of duality continues today as I celebrate both the secular holiday known as Christmas and as I prepare once again to mark the end of the spiritual season of Advent and the beginning of that great festival of Christmas. Yes, I have spent today baking cookies, making dinner, and wrapping presents along with the rest of my fellow Americans and a goodly portion of my…