STRENGTH against enemies, O Word, didst thou give by thy Baptism unto us who out of heartfelt love (πόθος) revere thy saving governance (οίκονομία), which willingly thou didst bring to completion, delivering mortals from the curse which had spread from Eden; for that we sing: Blessed is he who is made visible, our God glory be to thee.
They that once had garments of skins because of Adam, putting them on in the fall, today are putting them off in the running waters of the Jordan, in the Baptism of the Lord; speaking divine things with angels, unto him let us cry out: Blessed is he who is made visible, our God glory be to thee.
Glory be to the Father and to the Son and to the holy Spirit
both now and for ever, and to the ages of ages.
LET us, O ye faithful, raise our hymn to the greatness of God’s beneficence towards us; for upon our transgression, he became man and carried out our thorough cleansing in the Jordan, who alone is clean and without stain, sanctifying me and the waters, and breaking the heads of the dragons in the water. Let us therefore draw water with gladness, brethren; for to those who draw it trustingly, the grace of the Spirit is given invisibly from Christ, who is God and the Saviour of our souls.
WHEN thou wast baptized in the Jordan, O Lord,
the worship of the Trinity was made manifest;
for the voice of the Begetter was bearing witness
before thee, naming thee beloved Son,
and the Spirit in the form of a dove
was confirming the certainty of the spoken word*.
O Christ God, who appeared and lighted the world,
glory be to thee.
In the video, after the singing of the hymn above, Archimandrite Timotheos Kilifis gives a short summary of the feast. He explains that the baptismal “Feast of Lights” is also called Theophany (showing God) and Epiphany (showing forth) because it is the manifestation of the light of the Blessed Trinity, the Father from heaven, the Holy Spirit in the form of a dove, and the Son in the form of a servant, who is baptized by John the Baptist.
At Vespers for January 12. Source.