O God, who before the passion of your only-begotten Son revealed his glory upon the holy mountain: Grant that we, beholding by faith the light of his countenance, may be strengthened to bear our cross, and be changed into his likeness from glory to glory; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever. Amen.
Preface of the Epiphany or of the Transfiguration
Through Jesus Christ our Lord, who took on our mortal flesh to reveal his glory; that he might bring us out of darkness and into his own glorious light.