How does God's grace assure us of our salvation?

God's grace serves as a firm assurance of salvation because it is entirely free and unmerited, as illustrated in Romans 5:20, which notes that 'where sin abounded, grace did much more abound.' This means that no amount of sin can outstrip God's grace, offering a promise of forgiveness and acceptance through faith in Christ. The assurance of salvation based on grace allows believers to rest in the finished work of Jesus rather than in their own efforts or merits. This understanding breeds confidence in their salvation, knowing it is based on God's eternal promises rather than fluctuating human performance. Thus, grace becomes a source of hope and peace for Christians.