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The church of the apostles was imperfect and sometimes troubled, but its members had been overwhelmed by the Holy Spirit, who led them out to witness to the risen Christ. The book of Acts shows the followers of Jesus reaching out to a lost world with the glorious message of salvation.

was called either the Feast of Harvest,3 because it celebrated the completion of the grain harvest, or the Feast of Weeks or Pentecost, because it took place seven weeks or fifty days (pentēkostos means ‘fiftieth’) after the Passover, which was when the grain harvesting began.4 Towards the end of the inter-testamental period, however, it began also to be observed as the anniversary of the giving of the law at Mount Sinai, because this was reckoned as having happened fifty days after the Exodus.
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