'Making alive the mortal body'
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If it is true of us that we are stepping along in His light, continually yielding our course to the will of Christ expressed in us through the Holy Spirit, then we rapidly are approaching the place where the resurrection life of the Holy Spirit, which currently is at work in our spirit and soul, will fill our mortal body with eternal life. We will be alive—spirit, soul, and body.
But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken [make alive] your mortal bodies by his Spirit that dwelleth in you. (Romans 8:11)
Our salvation will not be complete until our body has been redeemed (Romans 8:23). The resurrection life of Christ will fill our mortal body until it has been brought out of the bondage of corruption into the glorious liberty of the children of God.
The redemption (adoption) of the body of the Christian saint will occur at the next coming of our Lord Jesus Christ. It will include the making alive of our mortal body and also the clothing of our resurrected body with our new spiritual body from Heaven (II Corinthians 5:2).
Little by little the Spirit of God brings us into the heavenly assault on our soulish nature. "City after city" fall as we cooperate with the Holy Spirit in conquering the wickedness and corruption residing in our natural life.
Down, down, down goes the Holy Spirit into the hidden caverns of our nature. The blood of Jesus works throughout our personality canceling the debt and purging the sin from us. Will we ever be rid of this sinful nature?
God is powerful enough to set us completely free, not just partially free. We must cooperate with God in the daily work of sanctification. We cannot purify ourselves apart from the Lord, and God will not purify us without our cooperation. We work together with God to accomplish the task of cleansing ourselves from "all filthiness of the flesh and spirit, perfecting holiness in the fear of God" (II Corinthians 7:1).
Only the physical body will need changing when Jesus comes, if we have been successful in the program of sanctification. The resurrection of the dead will occur when the seventh trumpet peals the fanfare announcing the King, and the kingdoms of the world become the kingdoms of our Lord and His Christ. Then the bodies of all who are in Christ will be changed from mortality into immortality.
The resurrection from the dead is the climax of the life of victorious living in Christ. The saints will be revealed together with Christ at His appearing and will administer the judgment of God on the world (Daniel 7:26,27; Colossians 3:4).