“Behold here what the Gospel is, namely, a joyful sermon concerning Christ, our Saviour. Whoever preaches him rightly, preaches the Gospel of pure joy. How is it possible for man to hear of greater joy than that Christ has given to him as his own? He does not only say Christ is born, but he makes his birth our own by saying, to you a Saviour.
Therefore, the Gospel does not only teach the history concerning Christ; but it enables all who believe it to receive it as their own, which is the way the Gospel operates… Of what benefit would it be to me if Christ had been born a thousand times, and it would daily be sung into my ears in a most lovely manner, if I were never to hear that he was born for me and was to be my very own?”
(Martin Luther, “Christmas Day, Luke 2:1-14, The Story of the Birth of Jesus; and the Angel’s Song,” Complete Sermons of Martin Luther, vol. 1, p. 149.)