O God, who in the glorious Transfiguration of your
Only Begotten Son confirmed the mysteries of faith by the
witness of the Fathers and wonderfully prefigured our full adoption
to sonship, grant, we pray, to your servants, that, listening to the voice
of your beloved Son, we may merit to become co-heirs with him. Who lives
and reigns with you in the unity of the Holy Spirit, one God, for ever and ever.