[Praxeus]

"How is it possible for Christ to be God and not have all of God's essence?"

I'll give you Phillipians 2:6-7 to answer:

7 but emptied himself, taking the form of a slave, being born in human likeness. And being found in human form,
8 he humbled himself and became obedient to the point of death-- even death on a cross. - (NSRV)

So it was an "emptied" (vs 7 NSRV) essence of God in Christ. It was impossible for ALL of God to be limited to a human form, Jesus was not limited to the earthly body. He was in heaven at the same time he was on earth:

And no man hath ascended up to heaven, but he that came down from heaven, even the Son of man which is in heaven. - (John 3:13 KJV)

The incarnation was a limiting of God's presence to a human body. This is what Mary bore. To say she bore God in any fashion other than derivatively is not accurate.

[Desdemona]

All things are possible with God. God the Son never left the body, never emptied from it. He emptied His humanity of all sin and became a slave for our sin.

What you say makes no sense. Either Christ was God or He wasn't. There are no shades of gray in this.

[Praxeus]

In fairness.. if you are a Catholic, John 3:13c does not appear in Alexandrian based Texts.

[Havoc]

Mary is more akin to the Ark of the Covenant. The ark was a container that had in and of itself NO power, No authority, Nothing. It was, apart from it's designated role, useless. It was pretty, I'm sure. It's worth was not in what it was; but, in what it bore. Remove that from it, and it was of no consequence. I am, of course, speaking in pragmatic relativism. Mary has no authority, no power and no place in the Godhead. Mary is mother of a human body, not the creator of God. She is creation, not created. And there is no giving and taking in marriage in Heaven. Thus she is neither mother nor queen in heaven - such roles cannot exist there. Rome has blown her up into something she's not and has twisted the gospel in so doing.
How perverse and blasphemous it gets seems to depend on which catholics are involved. That is a shell game. It's never anyone who is present..

[Havoc]

Correction to my highspeed typo "She is creation, not creator"