We know Christ paid our debt of sin through His sacrifice on the cross, which fulfilled God's justice and satisfied the penalty for our sins.
The assurance that Christ paid our debt of sin is fundamentally rooted in His sacrificial death on the cross, which is articulated in passages like Isaiah 53:5, where it states that He was wounded for our transgressions. The New Testament further affirms this in 2 Corinthians 5:21, which proclaims that God made Him who knew no sin to be sin for us. This concept employs the notion of surety, where Christ not only represents us but takes upon Himself the full weight of our transgressions. The debt was real, and it was only through Christ—who is both fully God and fully man—that we are liberated from this burden, demonstrating the depth of His love and grace towards His elect.
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