What does the Bible say about the atonement of Christ?

The concept of atonement is crucial in understanding Christ's role as our substitute. As detailed in the work of Hugh Martin, Christ's vicarious atonement is justified through His covenant-headship, reflecting a divine union with those for whom He died. This covenant-oneness means that Christ not only suffers for us but with us, establishing a profound connection between the Savior and the saved. Such a relationship validates the righteousness of His sacrifice, reaffirming the core belief that He was appointed by the Father before His incarnation to bear the sins of His people.