Alleluia!
Another very ancient hymn is the “Spiritus Divinae,” which is one of the matins used for the Lord’s Day:
Spiritus Divinae.
O glorious Spirit of the Light Divine;
Come, favour me;
Thou, God of Truth, in Israel once didst shine;
Lord, look on me;
Thou, Saviour, Son, and Light of Light, I know:
Shed forth Thy living lustre on my woe.
Thy Spirit is one substance with the Son,