How do we know that Christ's sacrifice was necessary for salvation?

The necessity of Christ's sacrifice is rooted in Scripture, particularly in Isaiah 53, which describes the Messiah bearing our griefs and carrying our sorrows. As the Lamb slain from the foundation of the world (Revelation 13:8), Jesus’ death on the cross was purposed by God to redeem humanity from sin. Without this atoning sacrifice, we would remain in our sins, as seen in Romans 6:23, which states the wages of sin is death. Therefore, Christ's journey to Jerusalem was essential for fulfilling the covenant of grace and securing our salvation through His shed blood.