How do we know that justification comes through faith, not the law?

In Galatians 3:11, Paul asserts that no one is justified by the law in the sight of God, as the righteous live by faith. This key doctrine reaffirms that human efforts to achieve righteousness through law-keeping are futile and insufficient. The law serves to reveal sin and our inability to fulfill its demands, leading us to recognize our need for a savior. It is Christ who fulfills the law perfectly and provides righteousness to believers through faith alone. The transformative power of faith allows believers to align their lives under grace instead of the law, fulfilling God's requirements through Christ’s righteousness that is credited to them.