How do we know redemption by the blood of Christ is true?

Redemption by the blood of Christ is a core tenet of the Christian faith, substantiated by numerous passages in the New Testament, such as Ephesians 1:7, which states that 'in him we have redemption through his blood, the forgiveness of our trespasses.' The sacrificial system in the Old Testament foreshadowed Christ’s atoning work, emphasizing that without the shedding of blood, there is no forgiveness (Hebrews 9:22). Our salvation hinges on Christ's substitutionary atonement, signifying that His blood was the perfect price paid for our sins. This doctrine brings comfort and hope, affirming that we are justified before God solely by faith in Christ's redemptive work.