How does Christ's death secure our salvation?

Christ's atoning death on the cross is foundational to the Christian faith, as it fully satisfies the justice of God for our sins. Isaiah 53:5-6 depicts Him as wounded for our transgressions, demonstrating that He bore the penalty we deserved. His death reconciles us to God, fulfilling the requirements of the law which we could not uphold. This means that every sin we committed has been paid for by Christ's sacrifice, and believers can now stand justified before God. It is through His finished work that we receive assurance of eternal life, confirming that our salvation is not based on our performance but on the efficacy of His sacrifice.