The means by which we are delivered from this state is through resurrection after the fashion of our Lord, who put on our human nature in order that it could be restored and glorified, which we see in evidence after His resurrection.
2 Corinthians 5:17-21
"Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new. And all things are of God, who hath reconciled us to himself by Jesus Christ, and hath given to us the ministry of reconciliation, To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation. Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God. For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him."
Of course, on the Cross, Jesus became sin for us. But Jesus was not born a sinner, in sinful flesh.
"For he hath made him to be sin for us,
who knew no sin; that we might be made the righteousness of God in him."
"For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are,
yet without sin.
Jesus did not have Adam's dead corruptible flesh. The whole point I have been making all along. Jesus was still 100% human. Jesus was the perfect Lamb without spot or blemish. Jesus was not just another sinner who died for and needed His own salvation. Jesus faced temptation and never gave in to that temptation.
What verse says He put on our human nature at birth? Hebrews 2:16
"For verily he took not on him the nature of angels; but he took on him the seed of Abraham."
"And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel."
Legally Jesus was born to Mary, and not some women in India. But human nature?
Jesus showed Peter, James, and John on the Mount of Transfiguration, His full glory, way before he died on a Cross and was resurrected. The Cross did not change Jesus. Jesus as the Lamb slain from the foundation of the world was the change needed for 2 Corinthians 5:1 to be possible:
"For we know that if our earthly house of this tabernacle were dissolved, we have a building of God, an house not made with hands, eternal in the heavens."
We will have that permanent incorruptible physical body from God, the moment we leave this physical corruptible body. And that is all because of the Cross. We will be like Jesus at the Second Coming as He was on the mount of Transfiguration.
"Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is."