permit me to ask this question pls. what do you understand by spiritual body? Remember that Christ eat with His disciples after His Resurrection. He even asked Doubting Thomas to touch Him! yes he had a spiritual body( glorified body) . A spiritual body is not necessarily an immaterial body. its rather a body that is exempt from corruption( effects of the fall ). At His incarnation, Christ picked up the corrupt body of humanity( but without being contaminated by it) That's why he hungered, he thirst, he got tire, he slept, and even cried! but after His resurrection a new body was given him. its call spiritual bc its the kind of body God intended for man. please read 1 Cor 15:42-44
Jesus' resurrected body was a 'transfiguration' of His flesh body nailed to the cross. This is why His resurrection body still has the marks of His crucifixion, even to this day. We shall forever... remember His sacrifice on the cross for us.
Our flesh bodies will not... be transfigured like His, but ours will still be like His resurrected body as far as the Heavenly dimension is concerned. That's why Paul called our glorified body "a spiritual body" in 1 Cor.15.
In Eccl.12:5-7, God through Solomon showed us a mystery about our created makeup. He said there, at death of our flesh there is a thing called a "silver cord" that is loosed, which apparently connects our spirit and flesh together. When it is severed, then our flesh body goes back to the earthly elements where it came from, but our spirit goes back to God Who gave it. Some have tried to say that spirit there only means some idea of animate spirit, something which even animals and plants have. But in Matt.10:28 where Jesus showed that one's soul still lives on after death of their flesh body, that's got to be what that spirit is that goes back to God. As a matter of fact, that is exactly the idea Apostle Paul taught in 2 Corinthians 5 about being absent from the body and rather being present with The Lord.
Because the NT teaches about one's spirit and soul continuing after flesh death, that is pointing to a fact about our created makeup, that we have a spirit with soul attached to our flesh body which it is released if our "silver cord" is severed at flesh death. But that's not all to understand.
How is our spirit different than our soul? Well, what kind of body did Paul teach the resurrection is? He said it is a "spiritual body". A body of spirit, meaning outward likeness and appearance. And per the Gen.18 example of the angels eating what Abraham prepared, and the sodomites of Gen.19 seeing the two angels as young men, it means that outward likeness or image of the spiritual body looks like flesh, and feels like flesh, and in many ways operates like a flesh body. But it's not flesh. It's made up of spirit, just not the idiotic ghost spirit stuff of Hollywood horror movies.
But our soul, that's the heart or center of our person, what science calls our Id. It's what makes each one of us our own individual person that God created. It is attached to that spiritual body image (resurrection body).
Like I've said many times, whether we are here on earth in the flesh, or in the resurrection body of the Heavenly dimension, we still need a vehicle for our soul to get around in. It's our flesh while living on earth. It's our resurrection body after flesh death.