“Now when they heard this they were cut to the heart, and said to Peter and the rest of the apostles, ‘Brothers, what shall we do?’” Acts 2:37.
Jerusalem was crowded with Jewish pilgrims visiting the city for the celebration of Pentecost fifty days after Passover, and the time was right for a mighty movement of God. The Holy Spirit had just descended upon the followers of Christ who were assembled there together. Being led by the Spirit, Peter got up to preach to the masses.
Peter’s sermon was powerful. He began with the prophet Joel and described how the coming of the Spirit fulfilled prophecies made by Joel and signaled that the “last day” had now been reached. He continued on through the Psalms and showed how David pointed forward to Jesus in his writings; showing that Jesus is Adonai and Messiah. Peter proclaimed the good news–the gospel–that this Jesus who was crucified and died was now alive, and that all who called upon His name would be saved.
Peter had come a long way; fifty days earlier he was cutting off the ear of one of those who had come to arrest Christ in Gethsemane. After that, he had denied knowing Jesus–not once, not twice, but three times; he even cursed Jesus’ name with his third denial. Peter was bold and brash, he acted before he thought. Now, only fifty days later–and after being filled with the Holy Spirit–he was preaching the first sermon of the Christian era. He was a fisherman from Galilee, utterly untrained as a teacher, yet he was teaching the Scriptures better than any rabbi had. He had been transformed by the Spirit.
The Spirit moved mightily in those hearing Peter’s words. Acts 2:37 tells us that they were “cut,” literally pierced, to the hearts. They were filled with the conviction of their sins and allowed to see the truth before them that Jesus is the Messiah. This cutting to the heart echoes the Old Testament prophets and is connected to the most fundamental of all Israelite customs: circumcision. We see this merger between the two when Moses commanded the Israelites to “Circumcise therefore the foreskin of your heart, and be no longer stubborn,” (Deuteronomy 10:16). Jeremiah echoes this appeal in his prophecies when pleading with the people to repent of their sinful ways. People needed to change their hearts–cut away the sin and excess– and follow God, yet they could not make this change through their own strength or actions.
The Spirit was the tool by which God would change the hearts of His people. The Spirit is transformative and regenerative. It provided the means of circumcising their hearts, and it presented them with a renewed spirit. Those whose hearts the Spirit cut and transformed would now be able to walk according to God’s statutes and commandments. They would now be able to be His people.
The Spirit is still at work and cutting hearts today. It can still transform lives. It has been poured out upon all mankind and is seeking to circumcise the hearts of those who feel the pierce of conviction. Submit to it, be baptized in the blood of Christ, be filled with the Spirit, and let it prune away the dead sinful skin of your heart. Allow it to transform you, just as it transformed Peter, and just as it transformed 3,000 people who heard him preach that day.