Yes he was made according to the flesh for a one demonstration of the unseen Spirit . His Spirit was not made or created.
I see that a little differently. Not a salvation issue .But to myself more of
how can we hear Him who remains without form. The order of Melchizedek was a continual order without beginning or end.
God is supernatural without nature as a beginning. He is not, nor neither could he be a man as us having mother and father beginning of spirit life or end thereof.
When he left he made it clear that we know him no more after the things seen the temporal (2 Corinthians 5:16) We walk by faith after the eternal unseen .Flesh and blood which would include His in which he said could not profit will not bring another demonstration of the lamb of God who was slain before the foundation of the world.
The Son of man, Jesus our savior resisted worship in respect to his temporal flesh . Saying things like... if I not go not (disappear) the Holy Spirit will not come. And when called good teacher according to His flesh he would give glory to God unseen saying: "only God is good".
He refused to be called a daysman all the days of his life. A daysman, not a common term is used to represent a fleshly mediator as a infallible umpire that is set between God not seen and Man with permission from both parties . Boldly the Pope takes that upon his self.
Job chapter nine seems to give us some understanding .
For
he is not
a man, as I am, that I should answer him, and we should come together in judgment. Neither is there any
daysman betwixt us, that might lay his hand upon
us both.Job 9:32-33
Mathew chapter 7 also seems to support . Informing us just as we are to call no man father on earth, the same applies with teacher or Master .No man can serve two masters as teachers. The flesh and the Spirit . One is our Father in heaven just as one is our master or Rabbi . We can plant the seed and another water it with the doctrines of God. But God alone causes the increase if any . Again the promise to come in the flesh as a demonstration of the unseen Spirit was once.
I thin Acts supports that conclusion.
Acts 1:11 Which also said, Ye men of Galilee, why stand ye gazing up into heaven? this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven
Or like the description in Revelation with the words clouds representing the unseen Spirit. Every eye of the believer heart will see him by faith as those given the privilege can to watch Just a Noah and his family that watched by faith(typified as watchers) . To those who have not ben give the privilege to watch he will come as a thief in the night sudden destruction will befall them. Typified as wailers.
Revelation 1:7Behold, he cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen