What does it mean that salvation is not based on works?

In Reformed theology, the assertion that salvation is not based on works is foundational. Galatians 2:21 states, 'I do not frustrate the grace of God; for if righteousness come by the law, then Christ is dead in vain.' This verse encapsulates the doctrine that if salvation could be attained through human efforts or adherence to the law, it would nullify the sacrificial work of Christ. Salvation is a unilateral act of grace from God, completely undeserved and not contingent upon human merit. Ephesian 2:9 further supports this by illustrating that it is by grace alone that we are saved, which eliminates any ground for boasting. This doctrine emphasizes the total reliance on Christ’s redemptive work, showcasing the nature of grace as unmerited favor from God.