O splendour of God's glory bright,
Who bringest forth the light from Light;
O Light, of light the fountain-spring;
O Day, our days illumining;

Come, very Sun of truth and love,
Come in thy radiance from above,
And shed the Holy Spirit's ray
On all we think or do to-day.

Teach us to work with all our might;
Put Satan's fierce assaults to flight;
Turn all to good that seems most ill;
Help us our calling to fulfil.

O joyful be the livelong day,
Our thoughts as pure as morning ray,
Our faith like noonday's glowing height,
Our souls undimmed by shades of night.

All praise to God the Father be,
All praise, eternal Son, to thee,
Whom with the Spirit we adore
For ever and for evermore.


St. Ambrose
tr. Compilers of Hymns Ancient And Modern