How do we know Christ's sacrifice at Calvary was sufficient?

The sufficiency of Christ's sacrifice at Calvary is ground in the completion of the work of redemption. Hebrews 10:14 declares that by one offering, He has perfected forever those who are sanctified. Once Christ bore the sins of His people—taking upon Himself the penalty of sin on the cross—He fully satisfied the demands of divine justice, thereby restoring life to those dead in trespasses and sins. The ultimate proof of this sufficiency is found in the resurrection; God raised Jesus from the dead, signifying that the penalty for sin had been fully paid and that death had been defeated for all who believe. This event assures us that all of our sin is removed and that we are reconciled to God.