But now that you have been set free from sin and have become slaves of God, the fruit you get leads to sanctification and its end, eternal life.
This is the will of God, even your sanctification.
1 Thessalonians 4:3
Sanctification is a work of the Holy Spirit which delivers us from the control of sin and transforms us into the likeness of Jesus Christ. God takes worldly thinking, fleshly habits, and unrighteousness behavior and convicts us of our wrongful thoughts, breaks our selfish patterns, and transforms our sinful actions through the Word of God, sacraments, prayer, circumstances, and Spirit-filled worship.
Sanctification is the progressive work of the Holy Spirit which creates Spirit-filled souls. He removes sinful imperfections as we are daily enabled to put off the bondages of sin and put on the life of Christ. Walking in the Spirit is actively attained for it involves continuous choices of faith and obedience. We passively receive the empowering of the Holy Spirit, but we purposely choose to appropriate his power for victory over the world, the flesh, sin, death, and the devil.
Fire is the chosen symbol of Heaven for moral passion. It is emotion aflame. God is love; God is fire. The two are one. The Holy Spirit baptizes in fire. Spirit-filled souls are ablaze for God. They love with a love that glows. They believe with a faith that kindles. They serve with a devotion that consumes. They hate sin with a fierceness that burns. They rejoice with a joy that radiates. Love is perfected in the Fire of God. Nothing can separate us from the love of God (Acts 2:1-4).
Samuel Chadwick, The Way of Pentecost (Berne, Indiana: Light and Hope, 1937), 21.