Why is salvation by grace important in Christianity?

In historic Reformed theology, salvation by grace is pivotal because it emphasizes that redemption is entirely a gift from God, not based on human works (Ephesians 2:8-9). This foundation ensures that all glory is directed to God and His grace, eliminating any basis for boasting on the part of humanity. God's grace is seen as the initiating force in the salvation process, from election to glorification. This perspective fosters dependency on God and leads to deeper worship and assurance of salvation, knowing that God's purpose prevails and is not contingent upon human actions.