9 Parthians, and Medes, and Elamites, and those dwelling in Mesopotamia, in Judea also, and Cappadocia, Pontus, and Asia, 10 Phrygia also, and Pamphylia, Egypt, and the parts of Libya, that 'are' along Cyrene, and the strangers of Rome, both Jews and proselytes, 11 Cretes and Arabians, we did hear them speaking in our tongues the great things of God.' 12 And they were all amazed, and were in doubt, saying one unto another, 'What would this wish to be?'
Matthew Henry's Commentary on Acts 2:9-12
Commentary on Acts 2:5-13
(Read Acts 2:5-13)
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.