We know God's power is sufficient because it is demonstrated through the gospel and the work of Christ, which assures us of our salvation.
The power of God is not found in personal achievements or religious rituals, but in the finished work of Jesus Christ. As noted in John 6, Jesus emphasizes believing in Him as the one whom God has sent. Our faith must be rooted in the understanding that salvation is entirely God's work, achieved through Christ's death and resurrection. Ephesians 1:4-5 affirms that we were chosen in Christ before the foundation of the world, showcasing His sovereign grace in our salvation. Thus, knowing and resting in Christ alone assures believers that God's power is indeed sufficient.
Scripture References:
Ephesians 1:4-5, John 6:29, Hebrews 9:12
Commentary