Luther had a wonderful “take” on Christmas and the birth of Christ “for us”. Here it is…………………….
Christ has a pure, innocent, and holy birth. Man has an unclean, sinful, condemned birth; as David says, Ps. 51, 5, “Behold I was brought forth in iniquity; and in sin did my mother conceive me.” Nothing can help this unholy birth except the pure birth of Christ. But Christ’s birth cannot be distributed in a material sense neither would that avail any thing; it is therefore imparted spiritually, through the Word, as the angel says, it is given to all who firmly believe so that no harm will come to them because of their impure birth. This it the way and manner in which we are to be cleansed from the miserable birth we have from Adam. For this purpose Christ willed to be born, that through him we might be born again, as he says John 3: 3, that it takes place through faith; as also St. James says in 1, 18: “Of his own will he brought us forth by the word of truth, that we should be a kind of firstfruits of his creatures.”
We see here how Christ, as it were, takes our birth from us and absorbs it in his birth, and grants us his, that in it we might become pure and holy, as if it were our own, so that every Christian may rejoice and glory in Christ’s birth as much as if he had himself been born of Mary as was Christ. Whoever does not believe this, or doubts, is no Christian.
0, this is the great joy of which the angel speaks. This is the comfort and exceeding goodness of God that, if a man believes this, he can boast of the treasure that Mary is his rightful mother, Christ his brother, and God his father. For these things actually occurred and are true, but we must believe. This is the principal thing and the principal treasure in every Gospel, before any doctrine of good works can be taken out of it. Christ must above all things become our own and we become his, before we can do good works.
But this cannot occur except through the faith that teaches us rightly to understand the Gospel and properly to lay hold of it. This is the only way in which Christ can be rightly known so that the conscience is satisfied and made to rejoice. Out of this grow love and praise to God who in Christ has bestowed upon us such unspeakable gifts. This gives courage to do or leave undone, and living or dying, to suffer every thing that is well pleasing to God. This is what is meant by Isaiah 9: 6, “Unto us a child is born, unto us a son is given,” to us, to us, to us is born, and to us is given this child,