O Trinity of blessed light,
O Unity of princely might,
The fiery sun now goes his way;
Shed thou within our hearts thy ray.
To thee our morning song of praise,
To thee our evening prayer we raise;
Thy glory suppliant we adore
For ever and for evermore.
All laud to God the Father be;
All praise eternal Son, to thee;
All glory, as is ever meet,
To God the Holy Paraclete. Amen.
Tune: Mainzer L.M
Music: Joseph Mainzer
Text: Lucis creátor óptime, attributed to St. Ambrose of Milan
Translation: John Mason Neale