How can we be sure that salvation is by grace alone?

The assurance that salvation is by grace alone is supported throughout Scripture, particularly in Ephesians 2:8-9, which 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 doctrine aligns with the preaching of the Apostle Paul, who stresses that our justification and sanctification before God is not hinged on our actions, but wholly based on the redemptive work of Christ. This grace is a sovereign act by God, revealing to sinners the salvation provided for them in Christ alone, emphasizing that we contribute nothing to our redemption.