Tagline.
My point is that if His Son is to be perfect, it makes no sense for Him to derive sick flesh, sick blood, a sick mind from a sick mother.
The OT analogy or foreshadowing would be the way the Ark of the Covenant prefigures Mary. It is to be plated entirely with gold; four rings of gold are to be attached to its four feet; the staves which carry it are overlaid with gold; A golden cover, a kapporet adorned with golden cherubim, is to be placed above the Ark. The Ark is finally to be placed behind a veil (full description at Exodus 25 or thereabouts) and treated with the greatest reverence. One might not even casually touch it, lest he die.
This is an image of the perfection and purity of the vessel carrying the mysterious Presence of the Lord.
In the Old Testament, the Ark of the Covenant, overshadowed by the the Spirit of God, was the instrument through which God came to dwell among men; in the New Testament, Mary, overshadowed by the Holy Spirit, is the instrument through which God came to dwell among men. That's why this Mary-Ark prefigurement makes sense.
Of any ordinary woman, we would naturally assume that the woman is a sinner. That is a given. I think we should not be justified in saying anything different of Mary, EXCEPT that the Angel of God sees it and says it otherwise. At no point is Mary called "full of sin." She is called "full of grace."
If God could make Mary sinless being born of sinful parents why couldn't He do that with His son?
**My point is that if His Son is to be perfect, it makes no sense for Him to derive sick flesh, sick blood, a sick mind from a sick mother.**
Christianity makes no sense.
That being said being born to a sinner is all part of the humiliation of Jesus.