Sufism or Islamic mysticism, which becomes prominent in the course of the 3rd cent. A.H., was partly a product of Hellenistic influences, and exercised a considerable influence on the philosophers of the time of Ibn Sina and afterwards. The name _Sufi_ is derived from _suf_ “wool,” and so means “wool-clad,” thus denoting a person who from choice used clothing of the simplest kind and avoided every form of luxury or ostentation. That this is the true meaning is proved by the fact that Persian employs as its equivalent the term _pashmina-push_, which also means “wool-clad.” By a popular error the Arabic writers on Sufism often treat the word as derived from _safa_, “purity,” and so make it something akin to “puritan”; and still more incorrectly certain Western writers have supposed that it is a transliteration of the Greek [Greek: sophos σοφός]. The emphasis is laid upon the ascetic avoidance of luxury and the voluntary adoption of simplicity in clothing on the part of those to whom the term is applied. If we regard this as a form of asceticism it will be at once objected that asceticism has no place in the teaching of the Qur´an and is alien to the character of early Islam. In a sense this is true, and in a sense untrue according to the meaning we attach to the term “asceticism.” As it is used in the history of Christian monasticism, or of the devotees of several Indian religions, or even of the latter Sufis, it implies a deliberate avoidance of the normal pleasures and indulgences of human life, and especially of marriage, as things which entangle the soul and prevent its spiritual progress. In this sense asceticism is alien to the spirit of Islam, and appears amongst Muslims only as an exotic. But the term may be used, not very accurately perhaps, of the puritanical restraint and simplicity which avoids all luxury and display, and deliberately tries to retain a primitively simple and self-denying manner of life. In this latter sense asceticism or puritanism was a distinguishing mark of the “old believer” as contrasted with the secularised Arab of the Umayyad type, and this attitude always had its admirers. The historians constantly refer with commendation to the abstemious lives of the early Khalifs and the “Companions” of the Prophet, and describe how they were abstinent not from poverty but in order to put themselves on an equality with their subjects, and to preserve the traditional mode of life of the Prophet and his first followers, and very often in the recognised Traditions we find mention of the bare and simple mode of life of the first Muslims. Quite early this simplicity appears as the distinctive mark of the strict Muslim, and emphasizes the difference between him and the worldly followers of the Umayyads, and similar instances appear amongst the devout Muslims of the present day. Such were not Sufis, but they may be regarded as the precursors of the Sufis. The historian al-Fakhri, describing the abstemious life of the