“Christ was obedient to his father in this, that he lived and served us. Because you are full and rich, you have no other commandment according to which you serve and obey Christ, except that you direct all your works so that they are good and useful to your neighbor, exactly as Christ’s works are good and useful to you … The purpose is that we, in turn, do likewise, not to him — he is not in need of it — but to our neighbor.”

Martin Luther. ‘The Gospel for Christmas Eve’ from the Christmas Postil. Luther’s Works, American Edition, vol. 52. (Philadelphia: Fortress Press, 1974), p. 16-17.