The essential part of the Christmas story is the baby. God came to us in human form, as part of creation and absolutely integral to it. That is the heart and essence of it. This is why the last reading at the service of Nine Lessons and Carols held in churches throughout Britain at this time of year is the first few verses of John’s Gospel, about the incarnation of the “Word”. This culminates in that spine-chillingly wonderful declaration: “And the Word became flesh and dwelt among us, full of grace and truth.” Without that, Christmas would be a rather vague festival.

In carols we sing about a baby, sweet and mild, one that “no crying makes”. This is wishful thinking, along with other parts of the story.

But some of it cannot be challenged, such as Mary, or in Greek, “Theotokos”, literally “God-bearer”. Her willingness to be part of God’s plan is central.

There seems little doubt that Jesus was born in a stable. The Bible says “outside the house”, and this was probably because the house was full. If it was a stable, there could have been animals at the birth of Jesus. We are also told that there were witnesses from the fields, shepherds taken by surprise by the news from the angels, rushing down from the hillsides, wondering in awe and then going back to their sheep, transformed by the coming of the baby.

The Wise Men were witnesses of the opposite kind. They were careful, calculating, educated men who think that they begin to discern God’s imminent arrival and who blunder their way across the region until they find what they think they’ve been seeking. They, too, go back transformed.

These are the really important bits of the story.

The Rev John Jennings is a Church of England clergyman and adviser to the Archbishop of Canterbury