How do we know saving grace is true?

Saving grace is a vital doctrine in Christianity as articulated in Ephesians 2:8, which declares, 'For by grace are ye saved through faith; and that not of yourselves: it is the gift of God.' This underscores that salvation is entirely the work of God and not a result of human effort, reiterating the principles of grace. The transformative power of saving grace is also demonstrated through the testimonies of the faithful, such as the Apostle Paul, who describes his own experience of receiving mercy and grace despite his past as a persecutor of the church. This doctrine assures believers that their salvation is secure and rooted in God's sovereign will.