The false premise here is God cannot give up some of His divine attributes and still be God.So He was not God? Is God not Omnipresent?
Either He and the Father are One or they are not.
No one said Jesus stepped outside of being the Messiah.It is worth considering. Do we really think that had the Lord decided to step outside of the Role of Messiah that there was anything that would not have been under His power?
Scripture does not say "His flesh" emptied itself. It says He (the pre-incarnate Second Person of the Trinity) emptied Himself. But, while in the flesh He performed His miracles through His anointing with the Holy Spirit.I don't view His flesh as limiting His power, but His Role. There was no storm that should arise that He could not calm, no crowd so large He could not feed, and most importantly, no man that was not under His power.
Jesus was always the Christ, the Messiah, the Anointed One.For the same reason He did not manifest as the Christ in the Garden, lol.
An all powerful God would not need to return to heaven, but an all-powerful God who had emptied Himself would need to meet conditions laid out for Him.I look at it like this: His Ascension was necessary due to the particular Ministry the Comforter would begin, and He returned to Heaven that this be understood. Prior to the Coming of the Comforter the Gospel of Christ was not being revealed to the hearts of men. This is a specific function of the Ministry of the Comforter.
That the Father and the Son are "one" is not in dispute. This is simply a repeat of the claim if Jesus emptied Himself while incarnate, He is not God. That dog will not hunt.Here we see that the Spirit and the Son will come to them/us.
Here we see the Father and the Son will come to them/us.
But, that Ministry is as distinct as the Ministry of the Christ was. That is why it was expedient that He leave (return to Heaven). It did not, in my view, have anything to do with the Omniscience, Omnipresence, or Omnipotence of God.
God bless.
In summary, He emptied Himself of some of His divine attributes to become God in the Flesh.