God’s will for every believer is his sanctification. It is the necessary and certain fruit of salvation, yet not meritorious; it is God alone who saves. Through the work of the Spirit, saints are called and enabled to live lives of holiness, “in” but not “of” the world, fully dedicated disciples of Jesus Christ, persevering to the end. Disciples are declared to be sanctified through the work of Christ and are also called to become sanctified in the experiences of life. The disciple's life will be characterized, among many, by battle with sin, repentance, sexual purity, gracious speech, prayer, suffering, persecution, being different from the world, living for the glory of God. Growth toward holiness brings with it assurance of salvation and a desire to share the gospel with sinners.