On the Day of Pentecost, Apostle Peter, freshly filled with the initial outpouring of the Holy Ghost, began to prophecy. His understanding opened by Jesus when he received the Great Commission (Luke 24:44-49), Peter preached the first gospel message (Acts 2:14-36).

Jesus had given Peter the keys of the kingdom of heaven and the authority that whatsoever he would loose on earth would be loosed in heaven. (Matthew 16:19 “loose” according to Thayer’s Greek Lexicon: “to declare lawful”).

When the Jews heard that Jesus, whom they had crucified, is both Lord and Christ, they were pricked in their hearts and asked Peter and the rest of the apostles, Men and brethren, what shall we do? (Acts 2:36-37)

"Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost." - Acts 2:38

For the first time, Peter used his God given authority, establishing doctrine for salvation – Acts 2:38.

Then, he continued to prophecy:

"For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call." - Acts 2:39

When Peter prophesied that the promised gift of the Holy Ghost is “to all that are afar off,” he did not realize he was speaking of the Gentiles. The beginning of the church, starting on the Day of Pentecost, was only Jews. Peter, unknowingly, prophesied of the promise of the Holy Ghost to not only the Jews and their children, but also to the Gentiles.

To be continued… The door of faith opened unto the Gentiles to take out of them a people for His name