Jesus' atonement is sufficient because it was offered once for all, perfectly fulfilling God's justice and providing complete forgiveness of sins.
We know Jesus' atonement is sufficient based on the theological foundation laid out in scripture, particularly in the book of Hebrews. Christ's sacrifice was a once-for-all event; He entered the Holy of Holies with His own blood, unlike the Levitical priests who had to repeatedly offer sacrifices. Hebrews 10:12 states that 'he, having offered one sacrifice for sins for all time, sat down at the right hand of God,' signifying the completion of his atoning work. Furthermore, Romans 3:25 explains that God set forth Jesus as a propitiation through faith, indicating that His sacrifice fully satisfied God’s wrath towards sin. Thus, through faith in Jesus, believers receive forgiveness, as His blood perfectly covers all iniquity, assuring us that no more sacrifice is needed.
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