'When God chose Mary for his instrument, when God himself in the manger at Bethlehem decided to come into this world, that was no romantic family portrait, but the beginning of a total turning point, a new ordering of all things on this earth. If we want to partcipate in this Advent and Christmas happening, we cannot simply be like spectators at a theater performance, enjoying all the familiar scenes, but we must ourselves become part of this activity, which is taking place in this "changing of all things." We must have our part in this drama. The spectator becomes an actor in the play. We cannot withdraw ourselves from it.'
Dietrich Bonhoeffer, Christmas Sermons, p.100.