Why is grace alone essential to salvation?

The principle of salvation by grace alone is vital for understanding the gospel. Romans 11:6 elucidates that if salvation were based on works, it would cease to be grace. This affirmation shapes the entire concept of redemption, highlighting that God's unmerited favor is what saves sinners. Grace alone emphasizes God's initiative in salvation without contingent contributions from humanity. This is a source of great comfort for believers, as it underscores that eternal security is rooted in God's power and purpose, rather than fluctuating human faithfulness or effort.