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

The doctrine of justification by the blood of Christ is fundamentally supported by passages like Romans 5:9, which explicitly states that believers are justified by His blood and saved from wrath. This underscores the importance of the sacrificial death of Christ, indicating that it is not merely Christ's life or teachings that justify sinners but specifically His shed blood. This theological concept reflects the depth of God's covenantal promises and highlights the efficacy of Christ's sacrificial work, which serves as the foundation of salvation for all believers.