What does it mean to be sanctified through the sacrifice of Christ?

Sanctification through Christ encompasses being set apart for God's purposes and being made holy through His sacrifice. In Hebrews 10:10, we see that we are sanctified through the offering of the body of Jesus Christ once for all. This means that believers are declared holy not by their works but by Christ's righteousness imputed to them. Furthermore, sanctification is an ongoing process where the Holy Spirit works in believers to grow in holiness and conform to the image of Christ, making them more like Him in character and action.