The History of Philosophy in Islam

by T. J. de Boer

6. According to the Encyclopaedia, Logic is related to Mathematics. In fact just as Mathematics conducts from the sensible to the intellectual, so Logic takes an intermediate position between Physics and Metaphysics. In Physics we have to do with bodies; in Metaphysics, with pure Spirits; but Logic treats of the ideas of the latter as well as of the representations of the former in our soul. Yet in range and importance Logic is inferior to Mathematics. For the subject of Mathematics is regarded not merely as an intermediary, but also as the essence of the All, while on the other hand Logic remains completely restricted to psychic forms as an intermediary between body and mind. Things are regulated by numbers, but our presentations and ideas by things.

The logical observations of the Brethren start from Porphyry’s Introduction, and the Categories, the Hermeneutics and the Analytics of Aristotle. They present nothing original, or very little.

To the five terms of Porphyry, a sixth,—the ‘Individual’—is added, no doubt for the sake of symmetry. Three of these,—Genus, Species, Individual,—are then called Objective Qualifications and three,—Difference, Property, Accident—Abstract or Conceptional Qualifications. The Categories are Genus-conceptions, of which the first is Substance, the other nine denoting its Accidents. The whole system of Concepts is farther developed by a division into species. But besides Division, there are three additional logical methods in use: Analysis, Definition and Deduction. Analysis is the method for beginners, because it permits a knowledge of what is individual. More subtle, however, as disclosing to us what is spiritual,—are [[90]]Definition and Deduction, the former investigating the essential nature of Species, and the latter that of Genera. The Senses apprise us of the existence of things; but acquaintance with the essence of things is gained by reflection. The information which is conveyed to us by the senses is small, as it were the letters of the alphabet. Of greater importance considerably are the principles of rational knowledge, just as words have more significance than letters; but the most important knowledge of all, lies in the propositions which have been derived from those principles, and which the human mind gains for itself or appropriates, in contradistinction to that knowledge which Nature or the Divine revelation has imparted to it.

7. From God, the highest Being, who is exalted above all distinctions and oppositions both of the Material and the Spiritual, the whole world is derived by the path of Emanation. If now and again a Creation is spoken of, that is only to be understood as a form of adaptation to theological language. The gradation then of the Emanations is exhibited as follows: 1. The Creative Spirit (νοῦς, ʻaql); 2. The Passive Spirit, or the All-Soul or World-Soul; 3. The First Material; 4. The Operative Nature, a power of the World-Soul; 5. The Absolute Body, called also, the Second Material; 6. The World of the Spheres; 7. The Elements of the Sublunary World; 8. The Minerals, Plants and Animals composed of these elements. These then are the eight Essences which,—together with God, the Absolute One, who is in everything and with everything—complete the series of Original Essences corresponding to the nine Cardinal Numbers.

Spirit, Soul, Original Matter, and Nature are simple; [[91]]but with Body we enter the realm of the Composite. Here all is composed of Matter and Form, or,—to adopt another principle of division,—of Substance and Accident. The first Substances are Matter and Form; the first Accidents or Properties, Space, Motion and Time, to which in the opinion of the Brethren may perhaps be added Tone and Light. Matter is one; all plurality and diversity come from the Forms. Substance is designated also as the constitutive, material Form, while Accident is the completing, spiritual Form. The Encyclopaedia does not express itself clearly on these points. But in any case Substantiality is looked for rather in the Universal than in the Particular, and Form is put before Matter. The Substantial Form, like a spectre, frightens off every attempt of the philosopher to investigate thoroughly the domain of the Material. The Forms wander at their own sweet will like lords through the lower world of Matter. No trace is discoverable of any inner relation between Matter and Form. Not only in thought, but also in reality they keep themselves separate.

From the account which has been given an idea may now be formed of the story of Nature as the Brethren viewed it. They have been represented as the Darwinists of the tenth century, but nothing could more inappropriate. The various realms of Nature, it is true, yield according to the Encyclopaedia an ascending and connected series; but the relation is determined not by bodily structure, but by the inner Form or Soul-Substance. The Form wanders in mystic fashion from the lower to the higher and vice versa, not in accordance with inner laws of formation, or modified to suit external conditions, but in accordance with the influences of the stars, and, in the [[92]]case of Man at least, in accordance with practical and theoretical behaviour. To give a history of Evolution in the modern sense of the term was very far from the thought of the Brethren. For example they expressly insist that the horse and the elephant resemble Man more than the ape does, although the bodily likeness is greater in the last-named. In fact in their system the body is a matter of quite secondary consideration: the death of the body is called the birth of the soul. The soul alone is an efficient existence, which procures the body for itself.

8. The teaching of the Brethren concerning Nature is therefore merged almost completely in Psychology. Let us confine ourselves here to the human soul. It stands in the centre of the All; and just as the World is a huge man, Man is a little world.

The human soul has emanated from the World-soul; and the souls of all individuals taken together constitute a substance which might be denominated the Absolute Man or the Spirit of Humanity. Every individual soul, however, is involved in Matter, and must gradually be formed into spirit. To that end it possesses many faculties or powers, and of these the speculative faculties are the choicest, for knowledge is the very life of the soul.

The soul of the child is at first like a white sheet of paper. What the five senses convey to it is first presented, then judged, and lastly stored up, in the front, middle, and hinder parts of the brain respectively. Through the faculty of speech and the art of writing, which make up the number of the internal senses to five, corresponding to the number of the External, the contents of Presentation are then realized. [[93]]

Among the external senses, Hearing takes precedence of Sight; for Sight, a mere slave of the moment, is occupied with what is actually present to the sense, whereas Hearing apprehends also what is past, and is conscious of the harmony of the tuneful spheres. Hearing and Sight constitute the group of the intellectual senses, whose effect must continue time without end.