Pentecost

Ten days after Jesus ascended into heaven, the twelve apostles, Jesus' mother and family, and many other of His disciples gathered together in Jerusalem for the Jewish harvest festival that was celebrated on the fiftieth day of Passover.  While they were indoors praying, a sound like that of a rushing wind filled the house and tongues of fire descended and rested over each of their heads.  This was the outpouring of the Holy Spirit on human flesh promised by God through the prophet Joel (Joel 2:28-29).

The disciples were suddenly empowered to proclaim the gospel of the risen Christ.  They went out into the streets of Jerusalem and began preaching to the crowds gathered for the festival.  Not only did the disciples preach with boldness and vigour, but by a miracle of the Holy Spirit they spoke in the native languages of the people present, many who had come from all corners of the Roman Empire.  This created a sensation.  The apostle Peter seized the moment and addressed the crowd, preaching to them about Jesus' death and resurrection for the forgiveness of sins.  The result was that about three thousand converts were baptized that day.  (You can read the Biblical account of Pentecost in Acts 2:1-41).