Preface 6 - Epiphany

From the Book of Divine Worship - The Proper: First Part - The Holy Eucharist - Rite Two - Prefaces for Seasons.

It is right, and a good and joyful thing, always and everywhere to give thanks to you, Father Almighty, Creator of heaven and earth; because in the mystery of the Word made flesh, you have caused a new light to shine in our hearts, to give the knowledge of your glory in the face of your Son Jesus Christ our Lord.