Remember, the upcoming holiday is not about Santa Claus. Neither is it about presents, stockings, Jimmy Stewart, turkey, etc. It is about the incarnation of the Word of God, Who is God Himself:
The Word of God came in His own Person, becaue it was He alone, the Image of the Father, Who could recreate man made after the Image.
In order to effect this re-creation, however, He had first to do away with death and corruption. Therefore He assumed a human body, in order that in it death might once for all be destroyed, and that men might be renewed according to the Image. The Image of the Father only was sufficient for this need. (St. Athanasius, On the Incarnation)
St. Athanasius is right. God became a man to save us, His beloved creation from annihilation, nothingness, spiritual death — the natural results of sin (sin being anything we do contrary to the Divine Image imprinted upon us).
Christmas is joyous because the Incarnation, the event wherein God took on flesh and pitched His tent among us, is the beginning of the events that lead up to the great Climax of History, the Death and Resurrection of God Almighty, wherein, trampling down death by death, with the lightning flash of His Godhead, Jesus Christ, King of All Creation, saved us from our sins, ourselves, the world, the devil.
Therefore, this Christmastide, let us raise our voices high with Charles Wesley:
Hail, the heaven-born Prince of peace!
Hail, the Sun of righteousness!
Light and life to all he brings,
Risen with healing in his wings.
Mild he lays his glory by,
Born that man no more may die,
Born to raise the sons of eath,
Born to give them second birth.