Acts 2:37

“Now when they heard this, etc.] Or “him”, as the Arabic version; that is, Peter speaking these things, describing the character of Jesus of Nazareth; opening the prophecies concerning him; asserting his resurrection from the dead, and exaltation at the right hand of God; ascribing this wonderful affair, of speaking with divers tongues, to his effusion of the Spirit; and charging them home with the iniquity of crucifying him: they were pricked in their hearts; the word of God entered into them, and was as a sharp sword in them, which cut and laid open their hearts, and the sin and wickedness of them; they saw themselves guilty of the crime laid to their charge, and were filled with remorse of…”

“pricked in their hearts--the begun fulfilment of Zac 12:10, whose full accomplishment is reserved for the day when "all Israel shall be saved" (see on Rom 11:26). what shall we do?--This is that beautiful spirit of genuine compunction and childlike docility, which, discovering its whole past career to have been one frightful mistake, seeks only to be set right for the future, be the change involved and the sacrifices required what they may. So Saul of Tarsus (Act 9:6).”

“Now when they heard this - When they heard this declaration of Peter, and this proof that Jesus was the Messiah. There was no fanaticism in his discourse; it was cool, close, pungent reasoning. He proved to them the truth of what he was saying, and thus prepared the way for this effect. They were pricked in their heart - The word translated were “pricked,” κατενύγησαν katenugēsan, is not used elsewhere in the New Testament. It properly denotes “to pierce or penetrate with a needle, lancet, or sharp instrument”; and then “to pierce with grief, or acute pain of any kind.” It corresponds precisely to our word “compunction.” It implies also the idea of sudden as well as acute grief. In this…”

“They said to the apostles, Brethren - They did not style them so before. Acts 2:38”

“2:37-38 Brothers, what should we do? Peter answered by strongly exhorting his listeners to repent of your sins and turn to God, and be baptized. See “Baptism” Theme Note.”

“they: Act 5:33, Act 7:54; Eze 7:16; Zac 12:10; Luk 3:10; Joh 8:9, Joh 16:8-11; Rom 7:9; Co1 14:24, Co1 14:25; Heb 4:12, Heb 4:13 Men: Act 1:16 what: Act 9:5, Act 9:6, Act 16:29-31, Act 22:10, Act 24:25, Act 24:26 Acts 2:38”