A historical English prayer collected in Prayers of the Middle Ages: Light from a Thousand Years, edited by J. Manning Potts.
Historical edition. Historical claims and instructions are preserved as historical context.
Almighty God, unto whom all hearts are open, all desires known, and from whom no secrets are hid; cleanse the thoughts of our hearts by the inspiration of Thy Holy Spirit, that we may perfectly love Thee, and worthily magnify Thy holy Name, through Jesus Christ our Lord. Amen.