How do we know that Christ's sacrifice was sufficient to purge our sins?

The sufficiency of Christ's sacrifice is rooted in the fact that He purged our sins by Himself without any contribution from humanity (Hebrews 10:10). This means that His death on the cross was not just a potential means of salvation, but an effective and total removal of sin for His people. God the Father expressed His satisfaction with this sacrifice, confirming that real atonement was made. Thus, those who believe can rest assured that their sins are truly purged and that they are seen as holy in God's sight.