Christmas for the Christian starts with Christmas day and lasts until Epiphany, also called the Manifestation of God to the Gentiles. It’s when the pagan wise men from the East make it to Nazareth with gifts of adoration for Jesus, who is likely about two years old when they arrive. In total Christmas is 12 days long, the context for what is popularly referred to (however naively) as the 12 Days of Christmas. This is similar to other feast times in the church like Easter, which actually lasts for 50 days until Pentecost. That said, it is right and good to continue to talk about Jesus’ incarnation, to keep the twinkle lights aglow in our home and on our house, and to keep reviewing the start of each Gospel (especially Matthew and Luke) throughout this time.
Lewis returns to the Incarnation time and again since without it, we only have some guy who dies a brutal death in the prime of life. With the incarnation, however, we have what the Gospels profess, what the Council of Nicea holds together, and what the Council of Chalcedon would further clarify in the 400s, and what every church in Christendom clings to as the truth that is making them (not them making it) – Jesus is, “light from light, true God from true God, begotten not made, of one being with the father…”
In Miracles (chapter 14), Lewis offers this reflection on the truth of the descending God:
In the Christian story God descends to reascend. He comes down; down from the heights of absolute being into time and space, down into humanity; down further still, if embryologists are right, to recapitulate in the womb ancient and pre-human phases of life; down to the very roots and seabed of the Nature He has created. But He goes down to come up again and bring the whole ruined world up with Him. One has the picture of a strong man stooping lower and lower to get himself underneath some great complicated burden. He must stoop in order to lift, he must almost disappear under the load before he incredibly straightens his back and marches off with the whole mass swaying on his shoulders. Or one may think of a diver, first reducing himself to nakedness, then glancing in mid-air, then gone with a splash, vanished, rushing down through green and warm water into black and cold water, down through increasing pressure into the death-like region of ooze and slime and old decay; then up again, back to colour and light, his lungs almost bursting, till suddenly he breaks surface again, holding in his hand the dripping, precious thing that he went down to recover. He and it are both coloured now that they have come up into the light: down below, where it lay colourless in the dark, he lost his colour too.
In this descent and reascent everyone will recognise a familiar pattern: a thing written all over the world. It is the pattern of all vegetable life. It must belittle itself into something hard, small and death- like, it must fall into the ground: thence the new life reascends. It is the pattern of all animal generation too. There is descent from the full and perfect organisms into the spermatozoon and ovum, and in the dark womb a life at first inferior in kind to that of the species which is being reproduced: then the slow ascent to the perfect embryo, to the living, conscious baby, and finally to the adult. So it is also in our moral and emotional life. The first innocent and spontaneous desires have to submit to the deathlike process of control or total denial: but from that there is a reascent to fully formed character in which the strength of the original material all operates but in a new way. Death and Rebirth—go down to go up—it is a key principle. Through this bottleneck, this belittlement, the highroad nearly always lies.
The doctrine of the Incarnation, if accepted, puts this principle even more emphatically at the centre. The pattern is there in Nature because it was first there in God. All the instances of it which I have mentioned turn out to be but transpositions of the Divine theme into a minor key. I am not now referring simply to the Crucifixion and Resurrection of Christ. The total pattern, of which they are only the turning point, is the real Death and Rebirth: for certainly no seed ever fell from so fair a tree into so dark and cold a soil as would furnish more than a faint analogy to this huge descent and reascension in which God dredged the salt and oozy bottom of Creation.
From this point of view the Christian doctrine makes itself so quickly at home amid the deepest apprehensions of reality which we have from other sources, that doubt may spring up in a new direction. Is it not fitting in too well? So well that it must have come into men’s minds from seeing this pattern elsewhere, particularly in the annual death and resurrection of the corn? For there have, of course, been many religions in which that annual drama (so important for the life of the tribe) was almost admittedly the central theme, and the deity—Adonis, Osiris, or another—almost undisguisedly a personification of the corn, a ‘corn-king’ who died and rose again each year. Is not Christ simply another corn-king?
To amplify this further, I offer you this short selection from Mere Christianity chapter five:
Did you ever think, when you were a child, what fun it would be if your toys could come to life? Well suppose you could really have brought them to life. Imagine turning a tin soldier into a real little man. It would involve turning the tin into flesh. And suppose the tin soldier did not like it. He is not interested in flesh: all he sees is that the tin is being spoilt. He thinks you are killing him. He will do everything he can to prevent you. He will not be made into a man if he can help it.
What you would have done about that tin soldier I do not know. But what God did about us was this. The Second Person in God, the Son, became human Himself: was born into the world as an actual man— a real man of a particular height, with hair of a particular colour, speaking a particular language, weighing so many stone. The Eternal Being, who knows everything and who created the whole universe, became not only a man but (before that) a baby, and before that a foetus inside a Woman’s body. If you want to get the hang of it, think how you would like to become a slug or a crab.
The result of this was that you now had one man who really was what all men were intended to be: one man in whom the created life, derived from His Mother, allowed itself to be completely and perfectly turned into the begotten life. The natural human creature in Him was taken up fully into the divine Son. Thus in one instance humanity had, so to speak, arrived: had passed into the life of Christ. And because the whole difficulty for us is that the natural life has to be, in a sense, ‘killed’, He chose an earthly career which involved the killing of His human desires at every turn—poverty, misunderstanding from His own family, betrayal by one of His intimate friends, being jeered at and manhandled by the Police, and execution by torture. And then, after being thus killed—killed every day in a sense—the human creature in Him, because it was united to the divine Son, came to life again. The Man in Christ rose again: not only the God. That is the whole point. For the first time we saw a real man. One tin soldier—real tin, just like the rest—had come fully and splendidly alive.
Philippians 2:6-8 is Paul’s way of summing up the significance of Jesus incarnate birth and his death and bodily resurrection that followed. He says that Jesus, “being in very nature God, did not consider equality with God something to be used to his own advantage; rather, he made himself nothing by taking the very nature of a servant, being made in human likeness. And being found in appearance as a man, he humbled himself by becoming obedient to death— even death on a cross!”