The Feast commemorates the descent of the Holy Spirit upon the Holy Apostles on the day of Pentecost, a feast of the Jewish tradition. It also celebrates the establishment of the Church through the preaching of the Holy Apostles and the baptism of thousands who on the day believed in the Gospel (Evaggelion "Good News") message of salvation through Jesus Christ. The Feast is also seen as the culmination of the revelation of the Holy Trinity.

The promise was now fulfilled and the Holy Spirit, given and sent by both the Father and the Son, descended. He shone round about the Holy Disciples and with Divine power kindled them all like lamps or, rather, He revealed them as heavenly lights set above the whole world, who has the word of eternal life, and through them, He illuminated all the earth. If from one burning lamp someone lights another, then another from that one, and so on in succession, he has light continuously. In the same way, through the Holy Apostles ordaining their successors and these successors ordaining others, and so on, the grace of the Holy Spirit is handed down through all generations and enlightens all who obey their spiritual shepherds and teachers...

A short while ago, with the strong eyes of faith, we beheld Christ ascending, no less clearly than those accounted worthy to be eye-witnesses. Nor are we less favored than they. "Blessed are they that have not seen, and yet have believed", says the Lord" (St. John 20:29), referring to those who have found assurance through hearing, and see by faith. Recently we saw Christ lifted up from the ground bodily (Acts 1:9).

The Holy Spirit is consubstantial (of one essence) with the Son and the Father, because all Three Persons of the Holy Trinity have a common essence or nature, and a common energy or intentional glory. This is why wherever Christ is, there is the Holy Spirit, and wherever the Holy Spirit is, there is Christ.

In recent days and months there has been some discussion on the significance and the use of bells. What is the purpose of church bells? Where did the tradition of church bells originate?

Before Christ ascended into Heaven He gave a command to His Disciples to return to Jerusalem after His Ascension and remain there until they were invested with power from Heaven. Thus He gave them the promise that they would receive the Holy Spirit, about which He had spoken during His life.