How do we know Christ's sacrifice is effective for purging sin?

The effectiveness of Christ's sacrifice in purging sin lies in its completion of God's requirements for justice and mercy. As stated in the sermon, mercy and truth are met in the person of Jesus Christ, who represents the perfect balance of divine attributes. It emphasizes that Christ's blood is the only means by which our iniquity can be purged. The New Testament consistently affirms Christ's role as the Lamb of God who takes away the sins of the world (John 1:29), ensuring that believers are covered and protected from God's wrath due to their faith in Him.