The events of this chapter change the disciples – and all future believers – forever! Jesus promised in Matthew 16:18 "I will build my church, and the gates of Hades will not overcome it." In Acts 2 the building the Church begins. What Jesus called his "Church" is the worldwide body of true followers of Jesus who are permanently indwelt and empowered by the Holy Spirit to live for Him and spread His gospel message to the ends of the earth. The Church was a new thing that began when the Holy Spirit came to live in this tiny band of followers. This was a HUGE event! Previously the Holy Spirit only temporarily empowered chosen people (kings, prophets and a few others). From this time forward all true followers of Jesus are given this privilege permanently!