What does the Bible say about the effectiveness of the gospel in salvation?

Scripturally, the gospel is presented as the sole means through which God saves His people. Romans 1:16 declares that it is the power of God for salvation to everyone who believes. The gospel reveals God's righteousness and grace, highlighting that salvation is not achieved through human works but through faith in Christ alone. This is further emphasized by Ephesians 2:8-9, which states that we are saved by grace through faith, and not of ourselves; it is the gift of God. Therefore, the effectiveness of the gospel rests entirely on God’s sovereign will and purpose, ensuring that all who come to Him in faith are saved.