What does the Bible say about the effectiveness of Christ's blood?

Ephesians 1:7 declares that in Christ we have redemption through His blood, which brings the forgiveness of our sins according to the riches of His grace. The effectiveness of Christ's blood is foundational to Reformed theology, affirming that His atonement not only covers sin but also secures salvation for His people. Unlike the blood of bulls and goats, which could only temporarily cover sin, the blood of Christ has an eternal quality, offering complete remission and establishing a permanent relationship with God. Through His sacrifice, believers are assured of their justification and acceptance in the sight of God, highlighting the richness of God's grace that operates in the lives of the elect.