How do we know that grace is paramount in salvation?

Grace is central to the doctrine of salvation as articulated in Ephesians 2:8-9, where it states that we are saved by grace through faith, not of ourselves. This reinforces the theological tenet that our works cannot earn salvation; it is a gift from God. Paul emphasizes this throughout Romans, showing that all men, whether Jew or Gentile, stand condemned under the Law, and thus, it is through God’s grace that we find redemption and reconciliation to Him, demonstrated through Christ's sacrificial death.