How do we know God saves sinners by His grace?

The account of Naaman illustrates the sovereign grace of God in saving sinners. Despite Naaman's status and accomplishments, he was still a leper, showcasing that human efforts cannot earn salvation. God's mercy is an unmerited gift that humbles the proud and uplifts the humble. As Ephesians 2:8-9 emphasizes, '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 reinforces the idea that salvation is fully the work of God, without human contribution.