How do we know that Jesus has the power to save us?

The power of Jesus to save is affirmed through His victorious work at the cross, where He took upon Himself the sin of His people, offering Himself as a substitute. According to scripture, the salvation He provides is not contingent upon human effort but on His grace alone. The enormity of this power is further emphasized by the fact that He was able to endure the ultimate death and yet rise again, thereby defeating sin, Satan, and death itself. Moreover, His ability to transform the hearts of His people—turning them from sworn enemies into willing followers—shows that His saving grace is as powerful as it is necessary for redemption.