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

Christ’s sacrifice is sufficient for atonement because it satisfies God’s holy justice, which no other act can accomplish. In Isaiah 53:10, it states that it pleased the Lord to bruise Him, indicating that God accepted Jesus’ sacrifice as just payment for sin. The uniqueness of Christ’s offering—His obedience and sinless nature—ensured that justice was served once, making Him the perfect Lamb of God. Consequently, through faith in Him, believers are justified before God, as nothing else can meet the demands of divine justice.