The Mystics of Islam

"I propose to offer a few remarks on the origin and historical development of Sufism, its relation to Islam, and its general character. Not only are these matters interesting to the student of comparative religion; some knowledge of them is indispensable to any serious student of Sufism itself." R. A. Nicholson Roots of Sufism: It is obvious that the ascetic and quietistic tendencies to which Nicholson has referred were in harmony wi...