I want to open by reading to you the opening passages from the Gospel of John:
In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things came into being through him, and without him not one thing came into being. What has come into being in him was life, and the life was the light of all people. The light shines in the darkness, and the darkness did not overcome it. There was a man sent from God, whose name was John. He came as a witness to testify to the light, so that all might believe through him. He himself was not the light, but he came to testify to the light. The true light, which enlightens everyone, was coming into the world. He was in the world, and the world came into being through him; yet the world did not know him. He came to what was his own, and his own people did not accept him. But to all who received him, who believed in his name, he gave power to become children of God, who were born, not of blood or of the will of the flesh or of the will of man, but of God. And the Word became flesh and lived among us, and we have seen his glory, the glory as of a father's only son, full of grace and truth.
Now unless you have a theology degree, that all may seem a bit confusing and like a lot of redundant talk.
But these first fourteen verses of the Gospel of John embody the essence of Christmas – of the light of the world breaking through the darkness of human despair and suffering and evil in the world. Of God becoming flesh and coming down into the world.