Does Jesus being "begotten" only point to him being born of the Father or is it not also bound up in his incarnation?
Can we divorce his incarnation from him being begotten of the Father?
Can we divorce the Son of Man from the Son of God?
Can we divorce Mary from the incarnation?
Can we divorce the temple from Christ or the incarnation of the temple in the flesh from Mary?
That God became man that man might become by grace what God is by nature means that we must know Christ, not cognitively, but through the uniting of God and His creation through the incarnation. We must become partakers in the divine nature.
We can not remove Mary from the marriage of the divine nature to the entire cosmos (all of creation) or we risk over-spiritualizing the very tangible relationship that God's creatures can have with their Creator through His Son. Jesus is incarnate of the Holy Spirit AND the Virgin Mary.
We can not divorce the Holy Spirit from the Virgin Mary or who we say we believe God is runs the risk of becoming unorthodox.
If we live a life according to who we say God is, then this necessarily effects our communion with God.
As St. Paul said, (if I remember correctly and I am paraphrasing here) we are our own epistles and how we life our life is how those epistles are to be read.
In short, how we live our life IS our doctrine.
Do you see Mary here, pointing to Christ? Do you see how she even points to his crucifixion?
We believe in one God, the Father Almighty, Maker of heaven and earth, and of all things visible and invisible. And in one Lord Jesus Christ, the Son of God, the only-begotten, begotten of the Father before all ages. Light of Light; true God of true God; begotten, not made; of one essence with the Father, by whom all things were made; who for us men and for our salvation came down from heaven, and was incarnate of the Holy Spirit and the Virgin Mary, and became man. And He was crucified for us under Pontius Pilate, and suffered, and was buried. And the third day He rose again, according to the Scriptures; and ascended into heaven, and sits at the right hand of the Father; and He shall come again with glory to judge the living and the dead; whose Kingdom shall have no end.
Glory to Jesus Christ