How do we know God saves by grace?

The assurance that God saves by grace is grounded in numerous biblical declarations, particularly in Romans, where Paul explains that 'salvation is of the Lord' and that it is based on the righteousness imputed through Christ, not on human merit. The covenant of grace, established before time, highlights that God's people are saved through faith that He provides, demonstrating that it is not of our own will or works but a gift from God. This grace is evidenced by the redemptive work of Christ, who fulfilled the covenant's demands by offering Himself, securing salvation for His elect, thus maintaining the purity of the gospel centered on grace alone.