How do we know that God has the power to save?

The power of God to save is rooted in the authority of Jesus Christ, as shown in Matthew 28:18 where He declares, 'All power is given unto me in heaven and in earth.' This emphasizes that Christ's authority is the basis for the gospel and the means through which salvation is applied to believers. Furthermore, in John 17:2, it states that the Son has been given power over all flesh to give eternal life to those whom the Father has given Him. Thus, the Reformed perspective asserts that it is through the person and work of Jesus that believers receive the gift of faith and the assurance of salvation, showcasing the complete reliance on God’s grace and power rather than human effort.