6 But the rumour of this having spread, the multitude came together and were confounded, because each one heard them speaking in his own dialect. 7 And all were amazed and wondered, saying, Behold, are not all these who are speaking Galilaeans? 8 and how do we hear [them] each in our own dialect in which we have been born,
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.