How do we know that redemption is accomplished by Jesus?

Redemption is accomplished through the death of Jesus, who is both the purchaser and the perfect sacrifice for our sins. The New Testament affirms that He did not merely attempt redemption but actually completed it through His blood. Romans 3:26 states that God is just and the justifier of the one who has faith in Jesus. Following His resurrection, Jesus was received into glory, demonstrating that His work of redemption was accepted by the Father. Therefore, our assurance of redemption lies in the completed work of Christ, which addresses our complete inability to save ourselves.