Why is the doctrine of the substitution important for Christians?

The doctrine of substitution is crucial because it underlines how God’s justice and grace intersect in the gospel. Without understanding that Christ took our place, believers would potentially slip into a performance-based faith, believing they must earn their favor with God. The truth is, our acceptance hinges entirely on Christ's righteousness, not our own. This foundational belief is echoed throughout scripture, affirming that our justification is based on Christ’s work alone. Consequently, it teaches humility and gratitude, knowing that salvation is a gift, not something we can achieve on our own.