Sanctification through the Spirit is a fundamental concept in Christian theology, referring to the process by which believers are set apart and made holy through the work of the Holy Spirit. According to Romans 8:13, believers are called to put to death the deeds of the flesh by the Spirit, and in 2 Thessalonians 2:13, it is written that God chose believers from the beginning for salvation through sanctification by the Spirit. As Galatians 5:16 notes, walking by the Spirit enables believers to avoid the flesh's desires and instead live a life that is pleasing to God, demonstrating the transformative power of the Holy Spirit in the lives of believers. Through this sanctifying work, believers are empowered to live a life of obedience and devotion to God, reflecting the character of Christ.
F.B. Meyer emphasizes the necessity of substituting the Christ-life for the self-life, arguing that self is the main impediment to spiritual growth. He uses the Epistle of Galatians to illustrate how the works of the flesh manifest in various forms of selfishness and how true sanctification comes th