How do we know that grace changes a believer's life?

According to the sermon, grace is not merely a covering or insurance; it is a transformative work that creates a new being. In 2 Corinthians 5:17, Paul identifies believers as new creations, indicating that old things have passed away. This divine work of grace is evident in believers' lives as they grow to be 'saints in light', characterized by their knowledge of God and a newfound ability to partake in the inheritance of eternal life. As God's grace works in their hearts, they are no longer what they used to be but are being transformed into the likeness of Christ.