How do Christians understand God's grace?

Christianity comprehends grace as a central theological concept indicating God's unmerited favor toward humanity, bestowed on those whom He has chosen. Ephesians 2:8-9 emphasizes that salvation is a gift from God, not of works, so that no one can boast. This grace is manifested through Christ's atoning sacrifice, as noted in Isaiah 45:23, where God’s sovereignty ensures that all will bow to Him. The recognition of grace as purely a gift fosters true humility among believers, motivating them to worship and serve God out of gratitude rather than obligation.