In this message from the Unstoppable series, Dr. Dan Reinhardt teaches from Acts 4:1–31 on what it means to live with Spirit-filled boldness in the face of opposition. As Peter and John stand before powerful authorities, we see that true boldness is not rooted in personality or position, but in the Lord Jesus Christ. This sermon explores how Spirit-filled boldness is truthful, tangible, and tenacious—and how all of it flows from a deep, reverent fear of God expressed through prayer. Believers are challenged to remain faithful, speak truth without compromise, and trust God’s sovereignty even when consequences come. This message calls the Church to live boldly, prayerfully, and confidently in a world that pushes back against the gospel.