What does grace mean in Christianity?

Grace is a foundational concept in Christian theology, referring to the unearned, unconditional love and favor that God extends to humanity. Ephesians 2:8-9 states, 'For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast.' This emphasizes that salvation is entirely a gift from God, highlighting His mercy in saving undeserving sinners. God's grace transforms lives, giving believers the ability to live in accordance with His will, as they rely not on their strength but on His empowering presence.