Rev: if Jesus was God, and you say he was. Who was Jesus' mother?
me: as I say?!? The bible says that Jesus is "God manifest in the flesh". Jesus mother is Mary. She is the mother of His "flesh".
There seems to be such a fundamental misunderstanding of the incarnation. God and man.
Peter for instance emphasizes the humanity of Jesus in His great sermon on Pentecost:
Act 2:22 Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God...
Peter is not dismissing the deity of Jesus, he's however focusing specfically on His humanity. Who He was as a man.
Gal 4:4 But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law,
Note, that Paul says that the Son was made of a woman...
There is absolutely nothing, nothing about the deity of Christ that was made. What was "made" of a woman is what Peter is discussing...the humanity of the incarnation. The bible has no problem speaking of Jesus as man, as God and sometimes as both...sometimes in the same verse or the same story.
The title "Mother of God" refers specifically and only as being mother to deity. That, is an impossibility, and frankly a title that Mary herself would have never embraced, as a God fearing Jew.
Mary was mother of Jesus, the Son of God. She was mother to the man. She had no part in the being mother to the divine, the diety, the Spirit, that was in Christ.
Therefore, I contest your assertion that it's a totally valid title (from a biblical perspective) and that it asserts deity and humanity. I affirm that it speaks only of deity (mother of God as if...).
But hey, feel free to agree to disagree...