How do we know Jesus' sacrifice is sufficient for our sin?

The doctrine of Christ's sacrifice being sufficient is rooted in His identity as both fully God and fully man. Hebrews 9:11-12 explains that Christ, as the high priest of the good things to come, entered the holy place with His own blood, obtaining eternal redemption for us. This indicates the perfection of His sacrifice – it is unmatched and uniquely effective. Furthermore, Romans 5:8-9 shows us that 'while we were yet sinners, Christ died for us,' which assures believers that through faith in Him, we receive justification. The shedding of His blood not only covers our sins but also reconciles us to God, fulfilling the requirements of divine justice.