Introduction & Definition:
To sanctify is to set apart for holy use, to separate out from the profane for the sacred (Hebrew, qadesh; Greek, hagiazo). As with justification, sanctification is the work of God. It is a work of grace based on the merit of Christ. Paul writes in Galatians 6:14, "May I never boast except in the cross of our Lord Jesus Christ, through which the world has been crucified to me, and I to the world." Through the work of Christ, God separates the believer from sin for the purpose of holiness, which is accomplished as the believer follows after the Spirit putting to death the misdeeds of the body (See also Romans 6:22; 8:1-14).
The entire Christian life depends on the sanctifying work of the Holy Spirit. As Paul wrote to the Thessalonians, "...from the beginning God chose you to be saved through the sanctifying work of the Spirit and through belief in the truth" (2 Thess. 2:13-14).
What then is involved in this sanctifying work of the Spirit in the believer? The full breadth of that work includes two dimensions. The first is initial sanctification that is positional in Christ and occurs when a person receives Jesus Christ as Savior. The second is the experiential dimension that is expected and commanded of Christians. For example, note Paul's words in Philippians 2:12, "...continue to work out your salvation with fear and trembling." The moment we accept Christ as Savior the believer dies to sin and becomes alive to holiness (Romans 6:2-4). Then Paul commands Christians to keep on counting themselves dead to sin but alive to God in Christ Jesus (Romans 6:11).
Holiness and sanctification must be translated into a some one's own life experience by the help of the Holy Spirit via the Word of God (John 17:17). This is that ...