Pentecost

In the Book of Acts , the application of Joel’s prophecy to the events in Jerusalem on the Day of Pentecost links the initial outpouring of the Spirit to the start of the “ Last Days .” The activity of the Spirit beginning on the Day of Pentecost is essential for understanding the rapid spread of the Gospel from Jerusalem to the very center of the Roman Empire, a process that must continue until the “ arrival ” or Parousia of Jesus on the “ Day of the Lord .”