The Bible teaches that being sanctified means to be set apart by God for His service and made holy through the redeeming work of Christ.
Sanctification is a fundamental doctrine in scripture, depicting the believer's set apart status conferred by God. It is the work of the Holy Spirit that brings a person from a state of sin to being marked as a saint. Paul, in 1 Corinthians 6:11, emphasizes that believers are washed and sanctified, signifying a transformation that is as much about identity as it is about status before God. The term itself implies being made holy, or perfect, which finds its ultimate expression in Christ, who sanctified himself so that those who believe might be sanctified in Him (John 17:19). This sanctification is an act of grace, unearned and wholly established by God.
Commentary