O God, Who in the glorious transfiguration of Thine only-begotten Son didst strengthen the mysteries of the faith by the testimony of the fathers, and Who didst wonderfully foreshow the perfect adoption of Thy children by a voice coming down in a shining cloud: mercifully grant that we be made co-heirs of the King of glory Himself, and grant us to be sharers in that very glory. Through the same Lord.