"Are you denying the Christ was God?"
I don't see a sarcasm tag, so I'll ask, "where, pray tell, did you get that idea from?"
I'm just taking a page from some of the accusations thrown at me on this thread. None of them had sarcasm tags either and even after I was explicit in believing that Jesus was 100% God and 100% Man in one person, I was accused of Nestorianism.
To be God, Christ's eternal pre-existence must be preserved. That Mary carried God in her womb I don't believe would be contested here. But Jesus brought his deity with him. It didn't have its origin, source, or anything else in Mary. He was HER God too. He was her Creator.
Mary as Mother of God is imprecise. It is fraught with difficulty (even though I know what the council was getting at and agree with their premise- I disagree with their title for the above mentioned reasons).
If I say God came to earth and through the agency of a human woman and the overshadowing of the Holy Spirit, became a man while still retaining His deity. That Man, was called Jesus. And, the name of His mother was Mary. Jesus was the Christ.
What is wrong with that statement?