Why is grace central to salvation in Reformed theology?

Sovereign grace theology emphasizes that our salvation is entirely by grace, through faith, and not of our own works. Ephesians 2:8-9 clearly states that we are saved by grace through faith, indicating that even faith itself is a gift from God. This grace ensures that no one can boast about their salvation, as it is God's sovereign choice to save. The focus is on Christ's righteousness and His sacrifice, which fulfills the requirements of justice and mercy, allowing God to graciously justify the believer.