from The Holy Eucharist: Rite I and Rite II
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 Christ our Lord. Amen.
Thomas Cranmer, 1489-1556
The Book of Common Prayer