On the day after every Great Feast, the Orthodox Church honors the one through whom the Feast is made possible. On the day following the Nativity of the Lord, for example, we celebrate the Synaxis of the Most Holy Theotokos (December 26). On the day after Theophany, we commemorate St John the Baptist (January 7), and so on.
Today we honor the all-Holy, good, and life-creating Spirit, Who descended upon the Apostles at Pentecost in the form of fiery tongues in fulfillment of the Lord’s promise to send the Comforter to His disciples (JN 14:16). That same Holy Spirit remains within the Church throughout the ages, guiding it “into all truth” (JN 16:13).
One of the hymns at Vespers on Saturday evening tells us that the Holy Spirit “provides all things. He gushes forth prophecy, He perfects the priesthood, … He holds together the whole institution of the Church.”
At Vespers on the day of Pentecost, we hear that the Holy Spirit is “the Fountain of goodness, through Whom the Father is known, and the Son is glorified.” He is “the living Fountain of spiritual gifts” Who “purifies us from our sins.” It is by the Holy Spirit that “the prophets, divine Apostles, and martyrs are crowned.” He is the source of life and of sanctification.
In the services of this day, we sing the same hymns as on Pentecost, except the Canon of the Holy Spirit, which is sung at Compline. The Vigil is not prescribed for the eve of today’s feast. We sing the Great Doxology at Matins, but not the Polyeleos. The Irmos of the Ninth Ode (“Hail, O Queen, glory of mothers and virgins…”) is sung in place of the Song of the Theotokos (“My soul magnifies the Lord…”).
At the Liturgy, the priest or deacon chants the Entrance Verse (“Be exalted in Thy strength, O Lord. We will sing and praise Thy power.”) as on the day of Pentecost. “Holy God” replaces “As many as have been baptized….” The dismissal of Pentecost is also used.
This whole week is fast-free, and the Leave-taking of Pentecost occurs on Saturday.
Apolytikion in the Plagal of the Fourth Tone
Blessed are You, O Christ our God, who made fishermen all-wise, sending upon them the Holy Spirit and, through them, netting the world. O Loving One, glory to You.
Kontakion in the Plagal of the Fourth Tone
When the Most High came down and confounded tongues of men, He divided the Nations. When He dispensed the Tongues of Fire, He called all to unity, and with one voice we glorify the Most Holy Spirit.
~Taken from the Mystagogy: The Weblog of John Sanidopoulos, http://www.johnsanidopoulos.com/2010/05/monday-of-holy-spirit.html.
Reading
As it is the custom of the Church, on the day after every great Feast, to honour those through whom it came to pass our Lady on the day after the Lord’s Nativity, Joachim and Anna after our Lady’s Nativity, the holy Baptist the day after Theophany, and so forth, on this day we honour our God the All-holy Spirit, the Comforter promised by our Saviour to His disciples (John 14:16), Who descended upon them at holy Pentecost and guided them “into all truth” (ibid. 16:13), and through them, us.
Rest from labour.
Apolytikion of Monday of the Holy Spirit
Plagal of the Fourth Tone
Blessed are You, O Christ our God, who made fishermen all-wise, sending upon them the Holy Spirit and, through them, netting the world. O Loving One, glory to You.
Kontakion of Monday of the Holy Spirit
Plagal of the Fourth Tone
When the Most High came down and confounded tongues of men (Babel), He divided the Nations. When He dispensed the Tongues of Fire, He called all to unity, and with one voice we glorify the Most Holy Spirit.
~Website of the Greek Orthodox Archdiocese of America (GOA), https://www.goarch.org/chapel/saints?contentid=1034&PCode=1PEM&D=M&date=06/08/2020
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