How do we know salvation is by God's mercy?

God's Word repeatedly emphasizes that salvation comes by grace through faith, as seen in Ephesians 2:4-5. We are saved by His mercy, which is great and extends to sinners who are undeserving. The concept of mercy in salvation is affirmed in David's prayers throughout the Psalms, where he continually asks for God's mercy despite his sinfulness. Salvation is depicted as a multitude of mercies that God applies to His chosen people, culminating in the work of Christ, who is the embodiment of God's mercy and grace.