The Holy Spirit is the active agent in our sanctification and seeks to produce His fruit in us as our minds are renewed, and we are conformed to the image of Christ. Though indwelling sin remains a reality, as we are led by the Spirit, we grow in the knowledge of the Lord, freely keeping His commandments and endeavoring to so live in the world that all people may see our good works and glorify our Father who is in heaven. All believers are exhorted to persevere in the faith, knowing they will have to give an account to God for their every thought, word and deed. The spiritual disciplines, especially Bible study, prayer, worship and confession, are a vital means of grace in this regard. Nevertheless, the believer’s ultimate confidence to persevere is based in the sure promise of God to preserve His people until the end, which is most certain.