The Holy Spirit fulfills the role of the sanctifier. To be sanctified is to be made holy, or righteous. Sanctification is a process that begins the moment we become Christians. The process continues until death when the believer is made finally, fully, and forevermore righteous….Our sanctification is a cooperative venture. We must work with the Holy Spirit to grow in sanctification. (R. C. Sproul, Essential Truths of the Christian Faith)