Behold here what the Gospel is, namely, a joyful sermon concerning Christ, our Savior. 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 Savior.
Therefore the Gospel does not only teach the history concerning Christ; but it enables all who believe it to receive it as their own … 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? If the voice gives forth this pleasant sound, even if it be in homely phrase, my heart listens with joy for it is a lovely sound which penetrates the soul.
Martin Luther (as published in Peace by Stephen J. Nichols, pp. 79)