How does the blood of Christ purify believers?

The cleansing power of Christ's blood is a foundational truth in Reformed theology, vividly illustrated in Revelation 7:14, where the multitude is described as having 'washed their robes and made them white in the blood of the Lamb.' This signifies that through faith in Christ, believers are purified from sin and made righteous. This cleansing is not based on human works or merit, but solely on the sufficiency of Christ's sacrifice. The importance of His blood underscores the concept of substitutionary atonement, affirming that through Christ's suffering, believers receive forgiveness and are deemed acceptable before God.