Why do many people reject the gospel of grace?

The sermon explains that the rejection of the gospel of grace comes from humanity's inherent desire for self-righteousness and salvation through works. Many people are ignorant of what the law requires and are unable to see their own sinful nature, which leads them to believe they can earn salvation. In Galatians 1:6-7, Paul warns against turning to a different gospel, indicating that the allure of self-salvation is a significant reason for this rejection. Humanity's fallen nature resists the idea that salvation is solely by grace and not through human effort.