6 When this sound was heard, the multitude came together, and were bewildered, because everyone heard them speaking in his own language. 7 They were all amazed and marveled, saying to one another, “Behold, aren’t all these who speak Galileans? 8 How do we hear, everyone in our own native language?
Matthew Henry's Commentary on Acts 2:6-8
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.