the substance, it is neither existent nor non-existent, but something between the two. Briefly the As̱ẖ‘arite position is as follows:-- "A thing has a proof of its existence or not. If not, it is called negative. If it has a proof of its existence, it is either substance or attribute. If it is substance and has the attribute of existence or non-existence, (i.e. it is perceived or not) it is existent or non-existent accordingly. If it is attribute, it is neither existent nor non-existent".[95:1] [94:1] Ibn Mubārak's Commentary, fol. 15a. [95:1] Ibn Mubārak's Commentary, fol. 15b. CHAP. V. ṢŪFĪISM. § I. The origin and Qurānic Justification of Ṣūfīism. It has become quite a fashion with modern oriental scholarship to trace the chain of influences. Such a procedure has certainly great historical value, provided it does not make us ignore the fundamental fact, that the human mind possesses an independent individuality, and, acting on its own initiative, can gradually evolve out of itself, truths which may have been anticipated by other minds ages ago. No idea can seize a people's soul unless, in some sense, it is the people's own. External influences may wake it up from its deep unconscious slumber; but they cannot, so to speak, create it out of nothing. Much has been written about the origin of Persian Ṣūfīism; and, in almost all cases, explorers of this most interesting field of research have exercised their ingenuity in discovering the various channels through which the basic ideas of Ṣūfīism might have travelled from one place to another. They seem completely to have ignored the principle, that the full significance of a phenomenon in the intellectual evolution of a people, can only be comprehended in the light of those pre-existing intellectual, political, and social conditions which alone make its existence inevitable. Von Kremer and Dozy derive Persian Ṣūfīism from the Indian Vedanta; Merx and Mr. Nicholson derive it from Neo-Platonism; while Professor Browne once regarded it as Aryan reaction against an unemotional semitic religion. It appears to me, however, that these theories have been worked out under the influence of a notion of causation which is essentially false. That a fixed quantity A is the cause of, or produces another fixed quantity B, is a proposition which, though convenient for scientific purposes, is apt to damage all inquiry, in so far as it leads us completely to ignore the innumerable conditions lying at the back of a phenomenon. It would, for instance, be an historical error to say that the dissolution of the Roman Empire was due to the barbarian invasions. The statement completely ignores other forces of a different character that tended to split up the political unity of the Empire. To describe the advent of barbarian invasions as the cause of the dissolution of the Roman Empire which could have assimilated, as it actually did to a certain extent, the so-called