How do we know grace is true in Christianity?

The truth of grace in Christianity is demonstrated through the sacrificial love displayed in the death and resurrection of Jesus Christ. Throughout Scripture, God is shown reaching out to the unworthy, reflecting His character of grace. Romans 5:8 states that God demonstrated His love for us in that while we were still sinners, Christ died for us. This act is the ultimate expression of grace, as Jesus took our sins upon Himself, bearing the punishment we deserve. Furthermore, stories like that of Mephibosheth, who was shown kindness not based on his worth but for Jonathan's sake, offer tangible illustrations of the gracious nature of God. The historical and scriptural consistency of this message across the entire narrative of the Bible validates the reality of grace within the Christian doctrine.