Why is it important to hear the gospel rather than rely on moral behavior?

The importance of hearing the gospel is paramount because, as stated in Romans 10:14, individuals cannot call on the Lord unless they believe, and they cannot believe without hearing the message of Christ. Relying on moral behavior alone is insufficient, as it does not provide the means for salvation. People can perform good works without genuine faith, but true salvation comes from believing the gospel. Therefore, it is through engaging with the gospel that the Holy Spirit works to bring repentance and faith to sinners.