How do we know salvation is all by grace?

Salvation is understood in Reformed theology as entirely by grace, supported by scripture such as Ephesians 2:8-9, which states that we are saved by grace through faith, not of ourselves; it is a gift of God. This reinforces the concept that salvation cannot be earned or achieved through personal merit. Acts 26 demonstrates the Apostle Paul's declaration of hope in Christ's work, which confirms that it is not our actions but Christ's death and resurrection that secure our salvation. This grace is further emphasized by the fact that Christ's atoning sacrifice was meant specifically for the elect, as God's plan before the foundation of the world.