How do we know salvation by grace alone is true?

The truth of salvation by grace alone is rooted deeply in Scripture, where it is emphasized that human works cannot attain God's favor. Ephesians 2:8-9 states, 'For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast.' The Apostle Paul consistently highlights that our salvation is not based on our merit or adherence to the law, which is only our schoolmaster (Galatians 3:24) but solely on the grace provided through Jesus Christ. This grace is sufficient and is how God ensures redemption for His elect people, as evidenced throughout His Word.