While "waiting in Jerusalem," the 11 drew lots and the Lord chose Matthias to replace fallen Judas. He "took his place" with the others, bringing the apostleship back to its full number. The "Twelfth Man" was now officially one of them. They were ready for what came next!
The pouring out of the Holy Spirit started something that has changed the world. There were fiery tongues on the apostles. There was the full, powerful and alarming sound of tornados that filled Jerusalem. Men came from everywhere to see what this noise was and what it indicated.
With his audience so conveniently gathered before him, Peter, standing with the 11, began to present Jesus to Israel as her Messiah. Joel's prophecy was being fulfilled in front of their eyes! What should they do?