How do we know Jesus is the perfect sacrifice for our sins?

In Hebrews, it is emphasized that Christ's sacrifice was once and for all, putting away sin with His own blood (Hebrews 9:26). This contrasts with the repeated sacrifices of the high priests, which could never fully atone for sin. Jesus, being sinless and the perfect man, is uniquely qualified to bear the sin of the world and satisfy divine justice (Hebrews 10:14). His single offering thus provides eternal redemption, signifying that His sacrifice is sufficient and complete, affording believers forgiveness and access to God.