How do we know God's grace is important for salvation?

The doctrine of sovereign grace teaches that salvation is entirely the work of God, given freely through Christ. In Romans, Paul elaborates on how no man can claim that they have earned God's favor; rather, it is by God's grace that individuals are saved. Ephesians 2:8-9 asserts that it is by grace you have been saved through faith, and this is not from yourselves; it is the gift of God, not by works, so that no one can boast. This emphasizes that grace is central to the gospel message and crucial for the salvation of sinners, underscoring God's sovereign choice in election.