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

The sufficiency of Christ's sacrifice is affirmed by His resurrection, which is a historical confirmation that death could not hold Him due to the fact that He bore the sins of His people. As Paul wrote, 'It was not possible that death should hold Him,' implying that Christ's work on the cross fully satisfied the justice of God. By raising Him from the dead, God declared that He accepted Christ's sacrifice as sufficient for our redemption, ensuring that all whom Christ represented will be saved.