St. Ambrose was a bishop in Milan and a great hymn writer. This text for the hymn during the Monday service of Lauds is attributed to him:

O true Sun, descend,
sparkling with uninterrupted brightness;
O radiance of the Holy Spirit,
pour in upon our senses.

May this day pass joyfully:
let modesty be as the dawn,
faith as the noonday;
let the spirit not know dusk.

Dawn carries on its course;
let the dawn go forward to everything;
all the Son is in the Father,
and all the Father is in the Word. Amen.