Light Of The World
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20 Behold, I stand at the door and knock; if any one hears my voice and opens the door, I will come in to him and eat with him, and he with me.
21 He who conquers, I will grant him to sit with me on my throne, as I myself conquered and sat down with
my Father on his throne. 22 He who has an ear, let him hear what the Spirit says to the Churches.
Revelation 3: 20-22. (rsv-sce)
The Church has many different depictions of the Holy Trinity. But the icon which defines the very essence of Trinity Day is invariably the one which shows the Trinity in the form of three angels.
The prototype for this icon was the mysterious appearance of the Holy Trinity in the form of three travelers to Abraham and Sarah under the oak of Mamre. The Church specifically chose this particular icon because it most fully expresses the dogma of the Holy Trinity: the three angels are depicted in equal dignity, symbolizing the triunity and equality of all three Persons.