How do we know Christ's sacrifice was sufficient for sinner's redemption?

The sufficiency of Christ's sacrifice is rooted in His role as the perfect, sinless Lamb of God, who bore the sins of humanity in His flesh. His death was necessary for the atonement of sin, fulfilling the requirements of justice while displaying God's mercy. Unlike the sacrifices of the Old Testament that required repetition, Christ's one-time sacrifice is sufficient for all who believe. His resurrection confirms the acceptance of His sacrifice by God, assuring believers of their redemption and the eternal life secured through Christ. This doctrine provides profound comfort and assurance, as we recognize that through Christ's death and resurrection, our sins are forgiven and we are reconciled to God.