"And when the day of Pentecost was fully come, they were all with one accord in one place" Acts 2:1.
The word must have gotten out that God was going to reveal some great thing to the apostles that he had never revealed to them before. People came from all over that part of the world to see and to hear what this was, Acts 2:9-11.
What happened next was one of the most amazing events in human history. A sound from heaven as of a rushing wind that filled the house where they were sitting. Cloven tongues like fire sat upon each one of them and they were all filled with the Holy Spirit and began to speak in other tongues, Acts 2:2-4.
Whatever God was going to reveal to the apostles must be very important for there to be such a demonstration of the Holy Spirit such as this.
"Cretes and Arabians, we do hear them speak in our tongues THE WONDERFUL WORKS OF GOD" Acts 2:11. The wonderful works of God is the Gospel of Jesus Christ. It is the Gospel that justifies ungodly sinners, Romans 4:5 and reconciles the world unto God, 2 Corinthians 5:19.
This message preached by Peter on the day of Pentecost literally turned Jerusalem upside down. Thousand heard and believed the Gospel and were saved, Acts 2:41, Acts 4:4. It was the Gospel message that gave birth to the New Testament church. "Faith came by hearing and hearing by the Gospel of Jesus Christ" Romans 10:17.
No one was predestinated to hear and believe this Gospel message. Some that heard the Gospel and believed it had participated in the crucifixon of Christ, Acts 2:36. Jerusalem was never the same after the day of Pentecost. The scripture says that the apostles went everywhere preaching the resurrection of Jesus Christ, Acts 4:2. They did not preach the death or the crucifixon of Christ, they preached the resurrection.
Pentecostals need to take note that nothing, absolutly nothing was said about the Pentecost experience of the sound of the rushing wind or the tongues experience. The apostles had a much greater message than that. The had the Gospel of Jesus Christ. They had the Gospel that is the power of God unto salvation, Romans 1:16. They had the Gospel that justifies the ungodly, Romans 4:5 and reconciles the world unto God, 2 Corinthians 5:19.