We do not believe that the virgin mother bore a son and that he is the Lord and Savior unless I believe the second thing, that he is my Savior and Lord.
"And in the same region there were shepherds out in the field, keeping watch over their flock by night. And an angel of the Lord appeared to them, and the glory of the Lord shone around them, and they were filled with great fear. And the angel said to them, "Fear not, for behold, I bring you good news of great joy that will be for all the people. For unto you is born this day in the city of David a Savior, who is Christ the Lord. And this will be a sign for you: you will find a baby wrapped in swaddling cloths and lying in a manger." And suddenly there was with the angel a multitude of the heavenly host praising God and saying,
"Glory to God in the highest, and on earth peace among those with whom he is pleased!" (Luke 2:8-14)
No sun, moon, stars, all creatures, physicians, emperors, kings, wise men, and potentates can help me. When I die I shall see nothing but black darkness, and yet that light, "To you is born this day the Savior", remains in my eyes and fills all heaven and earth. The Savior will help me when all have forsaken me. I see nothing in heaven and earth but this child. So great should that light which declares that he is my Savior become in my eyes that I can say: Mary, you did not bear this child for yourself alone. The child is not yours; you did not bring him forth for yourself, but for me, even though you are his mother, even though you held him in your arms and wrapped him in swaddling clothes and picked him up and laid him down. But I have a greater honor than your honor as his mother. For your honor pertains to your motherhood of the body of the child, but my honor is this, that you have my treasure, so that I know none, neither men nor angels, who can help me except this child whom you, O Mary, hold in your arms.
Reason says: Who knows? I believe that Christ, born of the virgin, is the Lord and Savior and he may perhaps help Peter and Paul, but for me, a sinner, he was not born. But even if you believed that much, it would still not be enough, unless there were added to it the faith that he was born for you.
We do not believe that the virgin mother bore a son and that he is the Lord and Savior unless, added to this, I believe the second thing, namely, that he is my Savior and Lord. When I can say: This I accept as my own, because the angel meant it for me, then, if I believe it in my heart, I shall not fail to love the mother Mary, and even more then child, and especially the Father. For, if it is true that the child was born of the virgin and is mine, then I have no angry God and I must know the feel that there is nothing but laughter and joy in the heart of the Father and no sadness in my heart. For, if what the angel says is true, that he is our Lord and Savior, what can sin do against us? If God is for us, who is against us? (Rom. 8:31). Greater words than these I cannot speak, nor all the angels and even the Holy Spirit, as is sufficiently testified by the beautiful and devout songs that have been made about it. I do not trust myself to express it.
It has been said sufficiently that this Savior lies in the manger. But if there is any other thing that saves me, then I rightly call it my savior. If the sun, moon, and stars save, I can call them saviors. If St. Bartholomew or St Anthony or a pilgrimage to St. James or good works save, then they surely are my savior. If St. Francis, then he is my savior. But then what is left of the honor of the child who was born this day, whom the angel calls Lord and Savior, and who wants to keep his name, which is Savior and Christ the Lord. If I set up any savior except this child, no matter who or what it is or is called, then he is not the Savior. But the text says that he is the Savior. And if this is true, and it is the truth, then let everything else go.
Do not only to believe in Mary's Son, but rather that he who lies in the virgin's lap is our Savior, that you accept this and give thanks to God, who so loved you that he gave you a Savior who is yours. And for a sign he sent the angel from heaven to proclaim him, in order that nothing else should be preached except that this child is the Savior and far better than heaven and earth. Therefore, we should acknowledge, accept and confess him as our Savior and call upon him, and never doubt that he will save us.
This is an excerpt from a sermon preached by Martin Luther