How does true preaching affect believers?

In his sermon, Paul emphasizes that true preaching is not in vain; it is effective and life-changing. When the gospel is preached in the power of the Holy Spirit, it works in believers, leading to growth in grace, love, and faith. The power of God's Word has the ability to transform hearts and bring about lasting change. As believers sit under authentic preaching, they are convicted of their sin, encouraged in their walk with Christ, and equipped to live out their faith in a world filled with challenges. Thus, true preaching serves as an essential means by which God nurtures and matures His people.