How do we know Jesus Christ's sacrifice is sufficient for our sins?

The sufficiency of Jesus Christ's sacrifice for our sins is rooted in His perfect obedience and the fulfillment of God's covenant promises. As affirmed in the New Testament, believers are not redeemed by corruptible things but by the precious blood of Christ, a lamb without blemish. The resurrection of Christ further confirms the efficacy of His atonement, as it signifies victory over sin and death, assuring us that through Him, we are justified and receive reconciliation with God. Believers can rest in the promise that if Christ has died for us, we shall also live with Him, as articulated in Romans 6:8. This total assurance is foundational in the Reformed view of salvation, emphasizing grace alone through faith in the finished work of Christ.