The first preachers of the gospel were all themselves Jews, who went out from Jerusalem, but soon Gentiles would be converted, and they too would preach, and they would preach to Jews about the Messiah they had failed to recognise. On the day of Pentecost when the gift of tongues was first given, it was the apostles who spoke in unlearned languages, and there was a practical reason for the gift. It allowed Jews visiting Jerusalem from many parts of the world at Pentecost, to hear the word of God in their own languages. At that time, the gospel had not proceeded far and there were no converted Gentiles, and so God gave this gift to Jews to fulfil Isaiah’s prophecy. Jews were hearing the gospel in other languages, and native people of those languages were soon to be converted. Tongues acted as a reversal of the judgment on the Tower of Babel, where God had first introduced languages into the world to disrupt human cooperation in godlessness. The gospel was going to bring men and women from all nations together into the one flock of Jesus Christ, and tongues which reversed Babel was a sign of that unity in Christ.