O Lord Christ, our indwelling power of transformation, who according to sacred lore upon Mount Tabor didst show Thyself in Thy true glory to thy disciples, grant that we thy servants may also in due time be transformed and transfigured into thy likeness, O Thou great liberator of the light from darkness.
The lesson is taken from the Book of the Prophet Isaiah:
There shall come forth a Rod out of the stem of Jesse, and a Branch shall grow out of his roots; and the Spirit of the Lord shall rest upon Him, the Spirit of wisdom and understanding, the Spirit of counsel and might, the Spirit of knowledge and reverence to the Lord. He shall not judge after the sight of His eyes, neither reprove after the hearing of His ears; but with righteousness shall He judge the poor, and reprove with equity for the meek of the earth; and righteousness shall be the girdle of His loins, and faithfulness the girdle of His reins. They shall not hurt nor destroy in all My holy mountain; for the earth shall be full of of the knowledge of the Lord, as the waters cover the sea.
The gospel is taken from the Gospel according to St. Matthew:
Jesus taketh Peter, James, and John his brother, and bringeth them up into a high mountain apart, and was transfigured before them; and His face did shine as the sun, and His raiment was white as the light. And behold, there appeared unto them Moses and Elias talking with Him. Then said Peter unto Jesus: Lord, it is good for us to be here; if Thou wilt, let us make here three tabernacles; one for Thee, and one for Moses, and one for Elias. While he yet spake, behold, a bright cloud overshadowed them; and behold, a voice cried out of the cloud, which said: This is My beloved Son, in whom I am well pleased; hear ye Him. And when the disciples heard it, they fell on their faces, and were sore afraid. But Jesus came and touched them, and said: Arise and be not afraid. And when they had lifted up their eyes, they saw no man save Jesus only.