I agree that in salvation, the entire man is redeemed. But if body, soul, and spirit need redeeming, then each facet of man must in some way be corrupted. Otherwise, one or more facets of the individual would not need redeeming. You stated earlier that when the flesh and soul are dead, they can no longer resist and the spirit is free to stop resisting and cooperate with the Spirit. However, the spirit actually needs to be quickened to relate to the Spirit.The body of man has a brain. The soul of man has a mind. And the spirit of man has a mind. You described a carnal mind, one that is focused on the flesh.
“For to be carnally minded is death, but to be spiritually minded is life and peace. Because the carnal mind is enmity against God; for it is not subject to the law of God, nor indeed can be. So then, those who are in the flesh cannot please God.”
So, you are right to say salvation is not something man can choose: the mind of the soul of an unredeemed man wants nothing of God. Therefore, the process of entering into the rest of God is only through death. A dead man cannot resist God. But, while the man is alive and strong he may resist Him.
So God stacked the deck, if you will.
He gave us creation to witness to the unseen aspects of Himself: things the five senses of man can discern.
The Sinai Law was given to produce desperation: an impossible standard without the provision of a redeemer.
And finally “we see Jesus” who might “taste death for everyone”.
So the gospel, to a man brought to the end of himself, to the point of despair, who can no longer resist God, is that the death he is assured to suffer has already been paid. And, now that he can no longer posture to resist God, he can receive the gospel in the spirit God gave him.. not in the mind of his soul, the mind of his spirit. His spirit did not originate with him, his parents did not give it to him, no natural line can take credit for his spirit. It is God’s and God gave it to him. So, when man ceases to resist God, the spirit of the man may respond to God’s Spirit. Man takes no credit. In fact, the credit is all the Lord’s.
This is why Paul further taught that God, in this transaction between God and God, if you will, gives life to man’s mortal bodies. Redemption covers the whole man: body, soul, and spirit.
Do you see my point? If the flesh and soul must die, the quickening of God in salvation must be the quickening of the spirit.
This is why I asked you about prevenient grace before. Those who believe in prevenient grace say God withholds the flesh...in your scenario, flesh and soul...which allows man the freedom to choose to respond to God or reject Him. This seems to me to be similar to what you are saying.
I still don't understand how you understand how an individual goes from his fallen natural estate to being saved or what role God plays in it and what role man has in it.