What does the Bible say about Christ's substitution?

In Hebrews 10:11-17, the concept of Christ's substitution is profoundly articulated. The phrase 'but this man' signifies a clear contrast between Christ and the Old Testament priests, who offered sacrifices that could never take away sins. Christ, however, offered Himself as the ultimate sacrifice 'once for all,' which not only pays the penalty for our sins but also reconciles believers to God, making them holy. This substitution is not merely a representation; it indicates that Christ took on the identity of His people, bearing their sins so that they would be seen as righteous before God.