How are Christians made holy according to the Bible?

The holiness of believers is achieved solely through the redemptive work of Christ, who, as stated in Hebrews 10:14, has perfected forever those who are sanctified. This means that through faith in His sacrifice, believers are judicially declared righteous, and thus set apart as holy before God. Furthermore, Philippians 2:13 reminds us that it is God who works in believers, both to will and to do of His good pleasure. Holiness is not a result of human effort but a gift of God's grace, accomplished through the work of the Holy Spirit in the life of each believer.