Why is it important to understand that salvation is by grace alone?

Recognizing salvation as an act of grace alone is crucial in Christian theology as it emphasizes the sufficiency of Christ's completed work on the cross. Ephesians 2:8-9 states, 'For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast.' This truth liberates believers from the futility of trying to earn their salvation through works, and it rightly attributes all glory to God for His mercy and grace in redeeming His people.