Reason and will would ascend and seek above, but if you would have joy, bend yourself down to this place. There you will find that boy given for you who is your Creator lying in a manger. I will stay with that boy as He sucks, is washed, and dies . . . There is no joy but in this boy. Take Him away and you face the Majesty which terrifies . . . I know of no God but this one in the manger.
-- Martin Luther, Christmas Sermon 1527.