There is a reason we call this the most wonderful day of the year: Christmas is truly filled with wonder. Or at least it should be. Somehow over the course of 2,000 years our wonder has become somewhat diluted, if not downright negative.
We consider the miracle of the incarnation--God taking on human form--and we pose a question we might ask of an illusionist: "I wonder how he did that?" Or worse, our wonder is more like doubt, mainly because we buy into the notion--on a practical level, at least--that Jesus was a wise teacher and a social justice advocate, but hardly the supernatural being Scripture makes Him out to be.
Neither of these senses of wonder--speculation or doubt--is anywhere near the wonder that Jesus should incite in us. We should be ashamed when we settle for a pedestrian kind of wonder. Our wonder at Jesus and the day He was born should rise far above our normal human emotions to the place where we are literally frightened at the very idea that the most holy God has identified with us in such a personal, self-sacrificial way.