Why is understanding Christ's substitutionary atonement vital for salvation?

The concept of substitutionary atonement is central to the gospel message in Reformed theology. Hebrews 10:14 states, 'For by one offering he hath perfected forever them that are sanctified.' This emphasizes that Christ's sacrifice was sufficient, perfecting all for whom He died. Understanding that our sins were laid upon Christ and that His righteousness is credited to us is crucial for grasping the full nature of our salvation. Without recognizing this fundamental truth, attempts at self-righteousness and legalism can creep in, leaving believers without the assurance of salvation. Recognizing Christ as the perfect substitute not only offers peace but also leads to true repentance and faith in Him alone.