Clive Staples Lewis was born November 29, 1898. On Christmas Day 1931, C.S. Lewis joined the Anglican Church and took communion.

“The White Witch? Who is she?
“Why, it is she that has got all Narnia under her thumb. It’s she that makes it always winter and never Christmas; think of that!”
“How awful!” said Lucy.
~The Lion, the Witch and the Wardrobe

It was a sledge, and it was reindeer with bells on their harness. But they were far bigger than the Witch’s reindeer, and they were not white but brown. And on the sledge sat a person whom everyone knew the moment they set eyes on him. He was a huge man in a bright red robe (bright as hollyberries) with a hood that had fur inside it and a great white beard that fell like a foamy waterfall over his chest. Everyone knew him because, though you see people of his sort only in Narnia, you see pictures of them and hear them talked about even in our world–the world on this side of the wardrobe door. But when you really see them in Narnia it is rather different. Some of the pictures of Father Christmas in our world make him look only funny and jolly. But now that the children actually stood looking at him they didn’t find it quite like that. He was so big, and so glad, and so real, that they all became quite still. They felt very glad, but also solemn.
~The Lion, the Witch, and the Wardrobe

“In the middle of winter when fogs and rains most abound they have a great festival which they call Exmas, and for fifty days they prepare for it in the fashion I shall describe. First of all, every citizen is obliged to send to each of his friends and relations a square piece of hard paper stamped with a picture, which in their speech is called an Exmas-card. But the pictures represent birds sitting on branches, or trees with a dark green prickly leaf, or else men in such garments as the Niatirbians believe that their ancestors wore two hundred years ago riding in coaches such as their ancestors used, or houses with snow on their roofs. And the Niatirbians are unwilling to say what these pictures have to do with the festival, guarding (as I suppose) some sacred mystery. And because all men must send these cards the market-place is filled with the crowd of those buying them, so that there is great labour and weariness.

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Such, then, are their customs about the Exmas. But the few among the Niatirbians have also a festival, separate and to themselves, called Crissmas, which is on the same day as Exmas. And those who keep Crissmas, doing the opposite to the majority of the Niatirbians, rise early on that day with shining faces and go before sunrise to certain temples where they partake of a sacred feast. And in most of the temples they set out images of a fair woman with a new-born Child on her knees and certain animals and shepherds adoring the Child. . . . But what Hecataeus says, that Exmas and Crissmas are the same, is not credible. For the first, the pictures which are stamped on the Exmas-cards have nothing to do with the sacred story which the priests tell about Crissmas. And secondly, the most part of the Niatirbians, not believing the religion of the few, nevertheless send the gifts and cards and participate in the Rush and drink, wearing paper caps. But it is not likely that men, even being barbarians, should suffer so many and great things in honour of a god they do not believe in.”
~God in the Dock, A Lost Chapter from Herodotus. Read the entire “lost chapter.”

I feel exactly as you do about the horrid commercial racket they have made out of Christmas. I send no cards and give no presents except to children.
~Letters to an American Lady.

He comes down; down from the heights of absolute being into time and space, down into humanity; down further still, . . . 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.
~Miracles.

The Son of God became a man to enable men to become the sons of God.
~C.S. Lewis, Mere Christianity

C.S. Lewis on Heaven.