For Heavenly Light

O God,
you are the well of life,
and in your light we see light.
Shine the light of your holy knowledge on us
and show us your flowing fountain.
Give our thirsty souls living water
and shine your light from heaven on our darkened minds;
through Jesus Christ our Lord. Amen.

Source: Mozarabic Liturgy

Freely modified from Prayers of the Middle Ages, edited by J. Manning Potts, 1953. The New Ancient Collects, #176