At conversion, the believer’s soul is transformed immediately. This is the beginnings of the new
creation (II Corinthians 5:17). The change of the soul is not a process and is the “now” part of salvation. The soul does not receive any more grace or forgiveness as time passes. All of those gifts are given in full when one depends upon Christ and they are applied to the soul.
The mind differs from the soul in that it is not instantly renewed at conversion. Listen to what Paul writes.
Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is – His good, pleasing, and perfect will.
- Romans 12:2 (NIV)
The word for “transformed” in the verse above is “metamorfow” which means to change into another form. Paul uses this word as a passive verb and as a command. Thus, Christians are commanded here to allow their minds to be changed.
What is the change of which Paul writes? The change is of the mind from being set on sinful things to being set upon the things of God. This change of mind is called repentance.
But Christians do not make the change of mind. They are to allow their mind to be changed. What changes the Christian mind? God changes the Christian mind. This change does not happen instantly at conversion. The mind incrementally gets transformed in this life. This comes as a process which is a work of God and a responsibility of submission for the Christian.
The process of renewing the mind never ends while on this earth. It is an ongoing working of God upon the mind of the saved person. As the mind gets renewed, the proper response of the Christian is to confess anything which does not conform to God’s ways.
This confession comes as one understands God’s will and submits to it. Confession is a process by which God reveals His will to His children and His children agree with Him. It includes a changing of the mind to come into agreement with God. Therefore, confession is a constant companion to the Christian while on this earth.
If we confess our sins, He is faithful and righteous to forgive us our sins and to cleanse us from all unrighteousness.
- I John 1:9 (NASB)
The body of the believer is also a work in progress. In other words, redemption does not immediately occur within the physical body. We can see this truth with our own eyes. Christians do not receive a perfect body at conversion. The body still grows old, it gets sick, decays, and eventually dies.
The only real visible effects of salvation upon the Christian’s physical body are apparent only as the mind gets transformed. This is because the body does as the mind tells it to do. As God works upon the mind and we submit, our bodies live differently. A redeemed mind directs the body to work differently. The only thing a Christian can do with his or her body is to present it as a living sacrifice. The body does not do much better in this life.
The Christian’s mind and body represent the “not yet” of redemption. By this I mean is that the redemption of these elements are not presently complete. The mind experiences a more developed redemption than does the body but even the mind does not reach full restoration in this life. The fruition of redemption for the mind and body comes after this life.
As a result of this “not yet” portion of redemption, Christians still sin. Our minds and bodies still rebel. They are not fully matured in Christ. This fact explains the disconnect between the Christian’s position in Christ and his practice.
 This is why believers must constantly be in the word of God; listening and submitting to God’s word.