How do we know the importance of grace alone in salvation?

Grace alone is an essential concept within Reformed theology, underpinning the belief that salvation is entirely a gift from God. This doctrine maintains that individuals cannot contribute to their salvation through works or efforts. Throughout history, from Abel to the Church today, it has always been through grace by which we are saved. Ephesians 2:8-9 reinforces this truth, stating that we are saved by grace through faith and not of ourselves, making clear that it is a gift from God. Any notion of human works contributing to salvation muddles the pure message of the gospel and introduces elements of false religion akin to Babylon.