This is Evelyn Underhill's 1922 translation o fthe medieval spiritual guidebook called The Cloud of Unknowing, written by an anonymous English monk. At the core is a mystical approach to Christian prayer, in which God is found not through rote knowledge, but through 'blind love.' It has been described as Christianity with a Zen outlook. The Cloud of Unknowing draws on the emystical tradition of Pseudo-Dionysius the Arepagite and Christian Neoplatonism, which focuses on the via negativa road to discovering God as a pure entity, beyond any capacity of mental conception and so without any definitive image or form. This tradition has reputedly inspired generations of mystical searchers from John Scotus Erigena, Nicholas of Cusa, and John of the Cross, to Teilhard de Chardin (the latter two of whom may have been influenced by The Cloud itself). Prior to this, the theme of The Cloud had been in the Confessions of St. Augustine (IX, 10) written in AD 398. --