How do we know that sanctification is by grace?

Sanctification, or the process of being made holy, is fundamentally a work of grace according to scripture. It is not achieved through human effort or adherence to the law but through the Holy Spirit's work within believers. As stated in Hebrews 10:10, we are sanctified through the offering of Jesus Christ once for all. This grace-oriented understanding of sanctification assures us that it is God who enables us to live righteously, not through our own strength, but through faith in Christ, which remains essential throughout the Christian life.