The Manifestation of God in Trinity
Theophany is the Feast which reveals the Most Holy Trinity to the world through the Baptism of the Lord (Mt.3:13-17; Mark 1:9-11; Luke 3:21-22). God the Father spoke from Heaven about the Son, the Son was baptized by Saint John the Forerunner, and the Holy Spirit descended upon the Son in the form of a dove. From ancient times this Feast was called the Day of Illumination and the Feast of Lights, since God is Light and has appeared to illumine “those who sat in darkness,” and “in the region of the shadow of death” (Mt.4:16), and to save the fallen race of mankind by grace.
The origin of the Feast of Theophany goes back to Apostolic times, and it is mentioned in The Apostolic Constitutions (Book V:13). From the second century we have the testimony of Saint Clement of Alexandria concerning the celebration of the Baptism of the Lord, and the night vigil before this Feast.
There is a third century dialogue about the services for Theophany between the holy martyr Hippolytus and Saint Gregory the Wonderworker. In the following centuries, from the fourth to ninth century, all the great Fathers of the Church: Gregory the Theologian, John Chrysostom, Ambrose of Milan, John of Damascus, commented on the Feast of Theophany.
The monks Joseph the Studite, Theophanes and Byzantios composed much liturgical music for this Feast, which is sung at Orthodox services even today. Saint John of Damascus said that the Lord was baptized, not because He Himself had need for cleansing, but “to bury human sin by water,” to fulfill the Law, to reveal the mystery of the Holy Trinity, and finally, to sanctify “the nature of water” and to offer us the form and example of Baptism.
On the Feast of the Baptism of Christ, the Holy Church proclaims our faith in the most sublime mystery, incomprehensible to human intellect, of one God in three Persons. It teaches us to confess and glorify the Holy Trinity, one in Essence and Undivided.