2:12 {2} And they were all amazed, and were in doubt, saying one to another, What meaneth this?
(2) God's word pierces some in such a way that it drives them to seek out the truth, and it so chokes others that it forces them to be witnesses of their own impudency.
2:12 They were all amazed - All the devout men.
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.