She became the Mother of God, in which work so many and such great good things are bestowed on her as pass man’s understanding. For on this there follows all honor, all blessedness, and her unique place in the whole of mankind, among which she has no equal, namely, that she had a child by the Father in heaven, and such a Child . . . Hence men have crowded all her glory into a single word, calling her the Mother of God . . . None can say of her nor announce to her greater things, even though he had as many tongues as the earth possesses flowers and blades of grass: the sky, stars; and the sea, grains of sand. It needs to be pondered in the heart what it means to be the Mother of God.
(Commentary on the Magnificat, 1521; in Luther’s Works, Pelikan et al, vol. 21, 326)
Since you may have not noticed, I will repeat here the most pertinent portions;
Mary most fundamentally ---Daughter of Israel. Ponder in your own heart & mind, what that means, bearing in mind all that transpired from Abraham, to the day Gabriel told her, "you will", not asking for permission at that time.
With Mary responding, in part;
She needed a Saviour as did the nation from which she herself sprang forth into life... and she knew it. That too, must be pondered, or else we err from the very moment of our beginnings of pondering, running risk of ranging far afield (thus far away) from all revelation given unto Israel through her prophets, including Christ Himself(!)