Pentecost is the celebration of the person of the Holy Spirit coming upon the Apostles, Mary, and the first followers of Jesus, who were gathered together in the Upper Room.

A “strong, driving” wind filled the room where they were gathered, and tongues of fire came to rest on their heads, allowing them to speak in different languages so that they could understand each other.

Happy Birthday, Church

It was right after Pentecost that Peter, inspired by the Holy Spirit, preached his first homily to Jews and other non-believers, in which he opened the scriptures of the Old Testament, showing how the prophet Joel prophesied events and the coming of the Holy Spirit at Pentecost.

He also told the people that the Jesus they crucified is the Lord and was raised from the dead, which “cut them to the heart.” When they asked what they should do, Peter exhorted them to repent of their sins and to be baptised. According to the account in Acts, about 3,000 people were baptised following Peter’s sermon.

For this reason, Pentecost is considered the birthday of the Church – Peter, the first Pope, preaches for the first time and converts thousands of new believers. The apostles and believers, for the first time, were united by a common language, and a common zeal and purpose to go and preach the Gospel.