Well, first of all, the setting in Bethlehem is crucial. It was the place chosen for Jesus to be born. Then there's the role of angels. Their announcements to Mary, Joseph, and the shepherds are vital parts of the story. Mary's acceptance of her role as the mother of Jesus, despite the social implications at that time, is also a key element. Joseph's faithfulness in standing by Mary and protecting the family is another aspect. And of course, the overall theme of hope and salvation that the Christmas story represents, which has been celebrated for centuries.