ROBERT SIEGEL, host:
As we mentioned, Pentecostalism as a movement is just 100 years old, but it is named for an event, Pentecost, that most Christian churches recognize and celebrate. It's the story in the Bible, the Book of Acts, that describes the descent of the Holy Spirit.
MELISSA BLOCK, host:
Pentecost Sunday is seven weeks, 49 days after Easter. The word Pentecost comes from the Greek word that means 50.
SIEGEL: In the first chapter of Acts, the events of Jesus's death and resurrection have just happened. He appears to the Apostles and tells them that they will be baptized not by water, but by the Holy Spirit within a few days.
BLOCK: Here is the moment of the Pentecost as described in the beginning of the second chapter of Acts.
SIEGEL: "Suddenly there came a sound from Heaven as of a rushing, mighty wind and it filled all the house where they were sitting. And there appeared unto cloven tongues like as a fire and it sat upon each of them. And they were all filled with the Holy Spirit and began to speak with other tongues as the spirit gave them utterance."
BLOCK: Today, the celebration of Pentecost Sunday for most Christians is the celebration of the appearance of the Holy Spirit, which they consider the third part of the Trinity.
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