Why is Christ's substitutionary sacrifice necessary for salvation?

The necessity of Christ's substitutionary sacrifice is rooted in the imperative that divine justice must be satisfied for sin. According to Romans 3:23-26, all have sinned and fall short of God's glory, and the penalty for sin is death. Jesus' death on the cross fulfills this requirement by serving as a substitute for sinners, bearing the wrath of God in their place (1 Peter 2:24). This doctrine is central to Reformed theology, asserting that only through faith in Christ can we be declared righteous before God. Therefore, understanding the significance of His sacrifice is essential for grasping the fullness of the gospel.