How do we know that salvation is through Christ's sacrifice?

The assurance of salvation through Christ's sacrifice is deeply rooted in the Scriptures, which highlight the plan of redemption established before the foundation of the world. In Mark 14, it is depicted that the crucifixion was not an accident but a divine necessity, predetermined so that the Son of God would take upon Himself the sins of His people. The blood of Christ functions analogously to the Passover lamb, fulfilling the sacrificial system established in the Old Testament. It is through His death that believers are assured of their justification and acceptance by faith, affirming that He is both Lord and Savior, hence affirming the truth of this doctrine.