The Cloud of Unknowing, ed. by Evelyn Underhill, [1922], at sacred-texts.com

p. 41

Here beginneth a book of contemplation, the which is called the CLOUD OF UNKNOWING, in the which a soul is oned with GOD.

p. 43

Here Beginneth the Prayer on the Prologue

GOD, unto whom all hearts be open, and unto whom all will speaketh, and unto whom no privy thing is hid. I beseech Thee so for to cleanse the intent of mine heart with the unspeakable gift of Thy grace, that I may perfectly love Thee, and worthily praise Thee. Amen.