I think it has to do with how the body, soul and spirit appear to God. The spirit, that which is born of God, does not sin. The soul, still needs to be saved and that is the process of sanctification. As the soul learns to operate more at the will of the Spirit, then the fruit of the Spirit is more apparent.
Originally Posted by reformedct
So our spirit is perfect but our soul requires pruning and chastisement.
"May the Lamb that was slain receive the just reward for His sufferings." A quote by Moravian missionary that sold himself (along with a friend) into slavery to reach those that the slave owner prevented from hearing the gospel.
May I live for Him and not for me.