O God of hope,
you are the true light of the faithful,
the perfect brightness of the blessed,
and the true light of your Church.
Grant that our hearts may humbly pray to you
and always offer you our praise
through Jesus Christ our Lord. Amen.
Source: Gelasian Sacramentary
Source of this version: Freely modified from Prayers of the Middle Ages, edited by J. Manning Potts, 1954