What does it mean to be purified by faith?

Purification by faith is a transformative process whereby individuals trust in Christ's atonement, resulting in a pure heart. Acts 15:9 mentions God purifying hearts by faith, indicating that this divine act is a gift rather than human merit. The act of believing in Jesus entails acknowledging one's sinfulness and wholly relying on His redemptive work rather than any works of the law. Hence, faith is not merely intellectual assent but a heartfelt reliance on the Savior that brings spiritual purity.