How do we know that Christ's atonement is sufficient for our sins?

Jesus Christ, as our substitute, bore the full weight of our sins on the cross. According to Isaiah 53, He was 'wounded for our transgressions' and 'bruised for our iniquities.' His sacrifice not only paid the penalty for our sins but also established a perfect righteousness through His obedience. This is a fundamental aspect of Reformed theology, emphasizing that our justification before God is based solely on the righteousness of Christ imputed to us (2 Corinthians 5:21). The resurrection of Christ is the assurance of our salvation, confirming that His sacrifice was accepted by the Father and provides redemption for all who believe.