It is not just God's spirit that was "in" Jesus, the fullness of God is "in" Jesus.
Col 2:9
For in Him dwells all the fullness of the Godhead bodily;
Your comment seems very similar to the Ebionite heresy which held that Jesus was a mere man endued with divine power and the heresy of Apollenarius who taught that the mind of Jesus was the divine Logos rather than a human mind.
The teaching of the church concerning the divine and human natures of Christ, since the council of Chalcedon (451) is as follows:
THEREFORE, following the holy fathers, we all with one accord teach men to acknowledge
1 one and the same Son, our Lord Jesus Christ,
2 at once complete in Godhead and complete in manhood,
3 truly God and truly man,
4 consisting also of a reasonable soul and body;
5 of one substance with the Father as regards his Godhead,
6 and at the same time of one substance with us as regards his manhood;
7 like us in all respects, apart from sin;
8 as regards his Godhead, begotten of the Father before the ages,
9 but yet as regards his manhood begotten, for us men and for our salvation, of Mary the Virgin, the Godbearer;
10 one and the same Christ, Son, Lord, Only-begotten,
11 recognized in two natures, without confusion, without change, without division, without separation;
12 the distinction of natures being in no way annulled by the union,
13 but rather the characteristics of each nature being preserved and coming together to form one person and subsistence,
14 not as parted or separated into two persons,
15 but one and the same Son and Only-begotten God the Word, Lord Jesus Christ;
16 even as the prophets from earliest times spoke of him, and our Lord Jesus Christ himself taught us,
and the creed of the fathers has handed down to us.
The Coptic (Egyptian and Ethiopian) and Assyrian churches did not accept this definition based on linguistic and semantic nuances arising from the words "in two natures" (line 11). In the Coptic and Aramaic languages, the preferred wording translated into English as "from two natures." Otherwise, they are in agreement.
If God had not taken on flesh, died in the flesh and raised from death in the flesh, there would be no resurrection and no hope of eternal life.
The whole problem with this topic is the over complication injected into what was suppose to be so simple to understand. Children we are not.
God did not have to take on Flesh. A man had to walk in the law perfect, without sin. Jesus came because of what Satan did, and God always keeps his Word and eternal laws. He is not lawless as many claim saying God is Sovereign, and does what he wants, to who He wants, when He wants.
Isa_53:10
Yet it pleased the LORD to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the LORD shall prosper in his hand.
1Jn_4:2 Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:
God Choose his Son. His Son had an advantage a man from Earth did not. He had always been with the Father, and knew how things worked.
One Asks, Is Jesus not God?
Of Course Jesus is God. His own Father said so.
Heb_1:8
But unto the Son he saith, Thy throne, O God, is for ever and ever: a sceptre of righteousness is the sceptre of thy kingdom.
This only gets confused using a Modalism, or Oneness doctrine. The Real Trinity Doctrine never used scripture, and they only become one by the mystery of Christian faith. Oneness and Modalism try to find their doctrine in scripture, and have to Ignore a bunch of other scriptures.
The other concept man really messes up is what is God.
Look in the mirror, for even to curse man is sin, for man is the likeness of God. Though I am working on this concept when dealing with folks who love to ignore tons of scriptures to hold on to the few to stay wrong.
There is nothing like the Father Though, hence the Lord God and the Lord Jesus mentioned separately in 52 different scriptures.
It's enough to say we are in the god class, but we are not the Father, but like Him. Jesus is the only one like us that had always also been the I Am. Always been here, we are begotten through Him, not the Father.
This World is sick, and we are not helping it out at all. Our kids are taught they live on a planet flying through space at 67,000mph and that they came from the tree's not so long ago. We are not important, there are other worlds like ours and we are just part of this great cosmic mix of space created from nothing.
There is no moral compass, because we have no moral origin or being, but that which a ape would have. Christians say we are humans, ignorant of the fact that the only thing that makes us legal here on Earth is the flesh the encases our spirit.
Now we have a World full of Me, Me, Me, Me, Me..................... Get what you can, while you can. The Love of money is the root of all evil, it's the only thing a ape/human has to show for anything.
We are suppose to be gods, like our Father, like Him, acting like Him. Instead, we are reduced to mere human components of flesh and blood, worthless as it all goes to dust. Science has done it's best to instill this idea that everyone is a part of a big cosmic nothing. An accident.
The Earth is the center of the universe, we are created Like God, we are the apple of His eye, far from the human flesh that surrounds us.
The deception is so far beyond what most believers can comprehend or understand. It won't stay so though. My hope is that it's not going to be to late for many.
Mike.