How do we know that our faith will not fail?

The assurance of a believer's faith is not found in personal strength but in the divine power of God that sustains them. As noted in 1 Peter 1:5, believers are 'kept by the power of God through faith.' This emphasizes that God is the ultimate author and finisher of our faith. Our strength to endure trials and stand firm is derived from the grace given to us through Christ. Though we may face challenges and crises of faith, the promise that He prays for us, as seen in Luke 22:32, reassures us that our faith will not ultimately succumb. It is God's faithfulness that guarantees our perseverance until the end.