Why is the concept of substitution important in Christianity?

The theological concept of substitution is central to the Christian faith. In 2 Corinthians 5:21, it states, 'For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him.' This illustrates that Jesus Christ, who was sinless, bore the weight of humanity's sin on the cross, serving as our substitute. The importance of this substitutionary atonement lies in the fact that it fulfills God's justice while simultaneously extending His mercy to sinners. Without substitution, there would be no reconciliation with God because a holy God cannot simply overlook sin. It is through Christ's sacrifice that believers are granted forgiveness and declared righteous before God.