In our celebration of Christmas, we are telling the story of world history. Just as the Fourth of July tells the story of independence from Britain, so Christmas tells the story of our successful war for independence from the devil. Christmas, and all the symbols of it (whether trees, carols, or Handel’s Messiah), are markers, monuments built from stone. They are an Ebenezer—thus far the Lord has helped us.
And practice. We order our lives around the life and accomplishments of Jesus. We do this, not so that we might live like pagans in between our holidays, but rather so that these holidays will mark and bound our lives, lives that are lived in the light of the conquering gospel.
And since we believe that the earth will be as full of the knowledge of the Lord as the waters cover the sea, by this celebration we are not only living out our own worldview, we are declaring to unbelievers what the worldview of the entire earth will someday be.