Jesus is only one person, and you cannot separate His spirit from the rest of Him. That would be Nestorianism, which was declared a heresy by the Church in the year 431.
http://orthodoxwiki.org/Nestorianism
A parent is parent to all of his/her child--not just the parts that came from that person. To deny that Mary is the mother of God (Jesus is the second person of the Godhood who became incarnate). To deny that Mary is the mother of God is to deny that Jesus was always divine. He did not become divine later in His life as God/Man. Referring to Mary as the Mother of God is all about protecting Christ's timeless divinity. You can't even refer to Christ as eternal God because eternity is still an expression of time, and God is outside time. Read the link above and see what both St. Cyril of Alexandria and the bishops at the Third Ecumenical Council decided.
Was Jesus Christ a flesh and blood Man?
The Man Jesus Christ was not Omnipresent while He was on earth in His Body.
The Spirit of Christ, is Omnipresent, as He dwelled within the Old Testament prophets, and those who are In Him today.
10 Of this salvation the prophets have inquired and searched carefully, who prophesied of the grace
that would come to you, 11 searching what, or what manner of time,
the Spirit of Christ who was in them was indicating when He testified beforehand the sufferings of Christ and the glories that would follow.
1 Peter 1:10-11
and again
9 But you are not in the flesh but in the Spirit, if indeed the Spirit of God dwells in you. Now
if anyone does not have the Spirit of Christ, he is not His. Romans 8:9
Are you God, because the Spirit of God dwells within you.
Are angels called God because they are the sons of God.
Jesus is the only Begotten of the Father, and is God before he became flesh.
God is Spirit.
God is not flesh.
God became flesh, in which He was made a little lower than the angels.
A little lower than the angels, means what He became was not God.
But we see Jesus, who
was made a little lower than the angels, for the suffering of death crowned with glory and honor, that He, by the grace of God, might taste death for everyone.
Hebrews 2:9
...was made a little lower than the angels, = flesh and blood Man.
He was both God [within] and Man [without].
That is why the scripture says -
For
there is one God and one Mediator between God and men,
the Man Christ Jesus, 1 Timothy 2:5
For many deceivers have gone out into the world who do not confess
Jesus Christ as coming in the flesh. This is a deceiver and an antichrist.
2 John 1:7
Flesh gives birth to flesh. Mary gave birth to the Man Jesus Christ.
Mary did not give birth to the Spirit of Christ.
JLB