How do we know Christ's sacrifice is sufficient for atonement?

The sufficiency of Christ's sacrifice for atonement is rooted in His divine nature and the perfect execution of God’s plan for salvation. Scripture reveals that Christ not only died but that His death was intended as a substitute for sinners—He bore our sins, satisfying God's justice that demands a penalty for transgression. Just as Aaron used the censer and incense to atone for the people, Christ’s death on the cross once and for all deals with our sin, ensuring that there is 'therefore now no condemnation to them which are in Christ Jesus' (Romans 8:1). His sacrificial blood was the final perfect offering, securing the salvation of all whom He represents.