Why is the doctrine of substitutionary atonement important for Christians?

The doctrine of substitutionary atonement underscores the centrality of Christ's work on the cross for the salvation of sinners. According to Reformed theology, Jesus, as our substitute, took upon Himself the punishment for our sins, satisfying God's justice and securing our forgiveness. This means that believers can stand before God declared righteous, not because of their works, but solely based on the merits of Christ's obedience and sacrifice. It provides the foundation for our assurance of salvation, emphasizing that our relationship with God is secure through what Christ has accomplished on our behalf. Believing that Christ died for our sins and rose again is the cornerstone of the Christian faith, offering both hope and certainty to all who trust in Him.