The Holy Feast of the Pentecost is celebrated on the fiftieth day after the Resurrection of Christ. The Icon of Pentecost depicts the descent of the Holy Spirit upon the disciples and the Virgin Mary in the likeness of tongues of fire.
The role of the Spirit is not to add anything to the riches of Christ but to enlighten, manifest and interpret. The Spirit Who is given to the apostles reveals the full meaning of Christ’s words and works without replacing them.
The Holy Spirit is not a substitute for Christ, but prepares us for Christ, forms Him in us, makes Him present in us.
A prayer to the Holy Spirit (taken from the prayer of the Third Hour of the Agpeya): “O Heavenly King, the Comforter the Spirit of Truth, Who art everywhere and fillest all things; Treasury of Blessings and Giver of Life; come and abide in us and cleanse us from every impurity and save our souls, O Good-One!”