“Look in your own heart,” says the Sūfī, “for the kingdom of God is within you.” He who truly knows himself knows God, for the heart is a mirror in which every divine quality is reflected. But just as a steel mirror when coated with rust loses its power of reflexion, so the inward spiritual sense, which Sūfīs call the eye of the heart, is blind to the celestial glory until the dark obstruction of the phenomenal self, with all its sensual contaminations, has been wholly cleared away. The clearance, if it is to be done effectively, must be the work of God, though it demands a certain inward co-operation on the part of man. “Whosoever shall strive for Our sake, We will guide him into Our ways” (Kor. =29.= 69). Action is false and vain, if it is thought to proceed from one’s self, but the enlightened mystic regards God as the real agent in every act, and therefore takes no credit for his good works nor desires to be recompensed for them. While ordinary knowledge is denoted by the term _ʿilm_, the mystic knowledge peculiar to the Sūfīs is called _maʿrifat_ or _ʿirfān_. As I have indicated in the foregoing paragraphs, _maʿrifat_ is fundamentally different from _ʿilm_, and a different word must be used to translate it. We need not look far for a suitable equivalent. The _maʿrifat_ of the Sūfīs is the ‘gnosis’ of Hellenistic theosophy, _i.e._ direct knowledge of God based on revelation or apocalyptic vision. It is not the result of any mental process, but depends entirely on the will and favour of God, who bestows it as a gift from Himself upon those whom He has created with the capacity for receiving it. It is a light of divine grace that flashes into the heart and overwhelms every human faculty in its dazzling beams. “He who knows God is dumb.” The relation of gnosis to positive religion is discussed in a very remarkable treatise on speculative mysticism by Niffarī, an unknown wandering dervish who died in Egypt in the latter half of the tenth century. His work, consisting of a series of revelations in which God addresses the writer and instructs him concerning the theory of gnosis, is couched in abstruse language and would scarcely be intelligible without the commentary which accompanies it; but its value as an original exposition of advanced Sūfism will sufficiently appear from the excerpts given in this chapter.[8] [8] I am now engaged in preparing an edition of the Arabic text, together with an English translation and commentary.