How do we know salvation is all of grace?

The doctrine of grace emphasizes that salvation is entirely the work of God, as seen throughout Scripture, particularly in Ephesians 2:8-9, which teaches that we are saved by grace through faith, and that not of ourselves; it is the gift of God. The foundation of this doctrine is God's unmerited favor bestowed upon the elect, ensuring that no one can boast of their own efforts. This grace extends to election, redemption, and regeneration, demonstrating a seamless thread of divine initiative in every aspect of salvation.