Acts 2:9

Διαλεκτος signifies commonly a different way of speaking, or pronouncing in the same language; as our southern, and northern men differ in some words and pronunciation, though speaking both the English tongue. God’s works being most perfect, the apostles might speak, not only the same language which all understood, but in the same idiom and propriety of speech which agreed to every one best.

I. The great concourse of people that there was now at Jerusalem, it should seem more than was usual at the feast of pentecost. There were dwelling or abiding at Jerusalem Jews that were devout men, disposed to religion, and that had the fear of God before their eyes (so the word properly signifies), some of them proselytes of righteousness, that were circumcised, and admitted members of the Jewish church, others only proselytes of the gate, that forsook idolatry, and gave up themselves to the worship of the true God, but not to the ceremonial law; some of those that were at Jerusalem now, out of every nation under heaven, whither the Jews were dispersed, or whence proselytes were come. The expression is hyperbolical, denoting that there were some from most of the then known parts of the world; as much as ever Tyre was, or London is, the rendezvous of trading people from all parts, Jerusalem at that time was of religious people from all parts. Now, 1. We may here see what were some of those countries whence those strangers came (v. 9-11), some from the eastern countries, as the Parthians, Medes, Elamites, and dwellers in Mesopotamia, the posterity of Shem; thence we come in order to Judea, which ought to be mentioned, because, though the language of those in Judea was the same with that which the disciples spoke, yet, before, they spoke it with the north-country tone and dialect (Thou art a Galilean, and thy speech betrays thee), but now they spoke it as correctly as the inhabitants of Judea themselves did. Next come the inhabitants of Cappadocia, Pontus, and that country about Propontis which was particularly called Asia, and these were the countries in which those strangers were scattered to whom St. Peter writes. 1 Pet 1 1. Next come the dwellers in Phrygia and Pamphylia, which lay westward, the posterity of Japhet, as were also the strangers of Rome; there were some also that dwelt in the southern parts of Egypt, in the parts of Libya about Cyrene; there were also some from the island of Crete, and some from the deserts of Arabia; but they were all either Jews originally, dispersed into those countries; or proselytes to the Jewish religion, but natives of those countries. Dr. Whitby observes that the Jewish writers about this time, as Philo and Josephus, speak of the Jews as dwelling every where through the whole earth; and that there is not a people upon earth among whom some Jews do not inhabit. 2. We may enquire what brought all those Jews and proselytes together to Jerusalem at this time: not to make a transient visit thither to the feast of pentecost, for they are said to dwell there. They took lodgings there, because there was at this time a general expectation of the appearing of the Messiah; for Daniel's weeks had just now expired, the sceptre had departed from Judah, and it was then generally thought that the kingdom of God would immediately appear, Luke 19 11. This brought those who were most zealous and devout to Jerusalem, to sojourn there, that they might have an early share in the kingdom of the Messiah and the blessings of that kingdom.

Verses 5-13 The difference in languages which arose at Babel, has much hindered the spread of knowledge and religion. The instruments whom the Lord first employed in spreading the Christian religion, could have made no progress without this gift, which proved that their authority was from God.