Acts 9 tells the story of one of the church's greatest enemies becoming one of its most passionate leaders. No one could have expected this complete turnaround to happen, especially not Saul of Tarsus. (Saul later becomes known as the apostle Paul, using his Roman name when his mission was primarily among Gentiles.) Emboldened by the Holy Spirit and seeing the evidence of the Spirit in Saul's life, the early followers of Jesus overcame Satan's barriers to see grace triumph over their enemies. For Saul (Paul) to become a great leader in this movement of grace and good news, he had to be filled, inspired, and empowered by the Holy Spirit, which is exactly what our verse today tells us was about to happen: Saul was about to be filled with the Holy Spirit, and the world would be changed by the Spirit's work through him!