Galatians 1:4 Who gave himself for our sins, that he might deliver us from this present evil world, according to the will of God and our Father:
Colossians 1:22 In the body of his flesh through death, to present you holy and unblameable and unreproveable in his sight:
Titus 2:14 Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.
These are not the only verses that answer this question but they do represent the answer. The answer is like the hand, it branches out into multiple directions but is still a part of the hand. Galatians 1:4 gives us the overarching purpose and that is that we might be delivered from this present evil world. This deliverance is accomplished in three stages. Stage 1 (called Regeneration) is the isolation of the human spirit from sin. Since we are incapable of lifting ourselves out of sins grasp, the Lord accomplishes this by placing the Holy Spirit within the person and permanently seals him as a child of God. At this point, God has committed to bring the powers of heaven to bear on the completion of His child. Yes, I am aware that the child of God will still act like the world because he is not yet finished. That is where stage 2 begins.
Stage 2 is the Sanctification (or setting apart) of the soul. This takes the remainder of the person’s life here on earth. It is in this stage that we learn what it means to walk by faith, and are transformed into the character and likeness of God. We discover how right God is in every area of our life. Our thinking is changed, our understanding is transformed, our actions take on a new purpose and our will is subdued. Grace defines the maturity of the child of God, more and more.
1John 3:2 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.
Philippians 3:21 Who shall change our vile body, that it may be fashioned like unto his glorious body, according to the working whereby he is able even to subdue all things unto himself.
Stage 3 is our Glorification and addresses our body. To be able to live in eternity with God we will need a spiritual body for this corruptible body cannot endure in His presence so we will be given a supernatural body like that of the Lord Jesus’ body that will never decay. Only then is the separation from sin completed. This is the work of the Lord as stated in Ephessians 2:10. We were created in Christ Jesus, we are transformed by Jesus and we are completed like Jesus, that we might be presented holy and unblameable and unreproveable in his sight: That is why Jesus endured the cross. The price was not to be compared with the value of God’s children.