Actually, you are operating with a false premise: “Christ is eternal.”
Jesus of Nazareth, or Jesus Christ (i.e., Jesus the Anointed), is NOT eternal. Jesus Christ was conceived in the womb of Mary, about 2000 years ago. Jesus of Nazareth, or Jesus Christ, BEGAN TO EXIST at that time.
Jesus of Nazareth is ONE PERSON. That Person is the eternal Word, or Son, of God the Father. He has existed from eternity in his divine nature. He began to exist in a human nature in the womb of Mary.
Is Mary the mother of one person, “the man,” and not the mother of some other person, “God”?
Jesus Christ is ONE PERSON. Thus, Mary cannot be mother of “the man Jesus” without being the mother of God.
Speaking of logic:
Mary is the mother of Jesus.
Jesus is God.
Thus:
Mary is the mother of God.
No one, ever, has propounded the idiotic notion that Mary is or was the mother of the eternal Triune Godhead. The title “Mother of God” has always meant only one thing: Mary is the mother of the Second Person of the Trinity by virtue of conceiving him in her womb so that he could begin to exist in a human nature.
John 2:1 On the third day there was a wedding at Cana in Galilee, and the mother of Jesus was there.
John 2:3 When the wine ran out, the mother of Jesus said to him, “They have no wine.”
Acts 1:14 All these with one accord were devoting themselves to prayer, together with the women and Mary the mother of Jesus, and his brothers.
I'll stick with the Holy Spirit over the opinion of an anonymous internet poster about what to call Mary.
That is the position of this Staples guy as well and that is ignorance of the Trinity...
In heaven, do people see the Father, the Son and the Holy Ghost???
Mary was the mother of Christ ONLY in His humanity not, as you stated, in His eternal deity.
To say Mary is the mother of God is completely false. Christ existed prior to Mary. It is completely wrong to insinuate that Christ was something less than He was prior to His human birth.