The subject proposed in the following pages is the history of the cultural transmission by which Greek philosophy and science were passed from Hellenistic surroundings to the Syriac speaking community, thence to the Arabic speaking world of Islam, and so finally to the Latin Schoolmen of Western Europe. That such a transmission did take place is known even to the beginner in mediæval history, but how it happened, and the influences which promoted it, and the modifications which took place en route, appear to be less generally known, and it does not seem that the details, scattered through works of very diverse types, are easily accessible to the English reader. Many historians seem content to give only a casual reference to its course, sometimes even with strange chronological confusions which show that the sources used are still the mediæval writers who had very imperfect information about the development of intellectual life amongst the Muslims. Following mediæval usage we sometimes find the Arabic writers referred to as "Arabs" or "Moors," although in fact there was only one philosopher of any importance who was an Arab by race, and comparatively In the 3rd century A.D. we find the beginnings of what is known as neo-Platonism. A very typical passage in Gibbon's Decline and Fall (ch. xiii) refers to the neo-Platonists as "men of profound thought and intense application; but, by mistaking the true object of philosophy, their labours contributed much less to improve than to corrupt the human understanding. The neo-Platonists were the result, we may say the inevitable result, of tendencies which had been at work ever since the age of Alexander and the widening of the mental horizon and the decay of interest in the old civic life. The older philosophers had endeavoured to produce efficient citizens; but under imperialist conditions efficient citizens were not so much wanted as obedient subjects. Through all this period there are very clear indications of the new trend of thought which assumes a more theological and philanthropic character, aiming at producing good men rather than useful citizens. The speculations of Philo the Jewish Platonist give very plain indications of these new tendencies as they appeared in Alexandria. He shows the monotheistic tendency which was indeed present in the older philosophers but now begins to be more strongly emphasized as Platonic school, was tending. But, as causation to some extent implies change, this First Cause could not be regarded as directly creating the world, but only as the eternal source of an eternally proceeding emanation by means of which the power of the First Cause is projected so as to produce the universe and all it contains. The essential features of this teaching are, the absolute unity of the First Cause, its absolute reality, its eternity, and its invariability, all of which necessarily removes it above the plane of things knowable to man; and the operative emanation ceaselessly issuing forth, eternal like its source, yet acting in time and space, an emanation which Philo terms the Logos or "Word." Although these theories are to a large extent only an expression of logical conclusions towards which the Platonists were then advancing, Philo had curiously little influence. No doubt there was a tendency to regard his teaching as mainly an The tendencies which were at work in Philo were also leavening Greek thought outside Jewish circles and all schools of philosophy show a growing definiteness in their assertion of One God eternal and invariable, as the source and First Cause of the universe. It is a recognition of the principal of uniformity in nature The first point is to understand what is to be implied in the term "soul." Plato was really a dualist in that he regards the soul as a separate entity which animates the body and compares it to a rider directing and controlling the horse he rides. But Aristotle makes a more careful analysis of psychological phenomena. In the treatise de anima he says "there is no need to enquire whether soul and body are one, any more than whether the wax and the imprint are one; or, in general, whether the matter of a thing is the same with that of which it is the matter." (Aristot: de anima. II. i. 412. b. 6.) Aristotle defines the soul as "the first actuality of a natural body having in it the capacity of life" (id. 412. b. 5), in which "first" denotes that the soul is the primary form by which the substance of the body is The soul contains four different faculties or powers which are not strictly to be taken as "parts" though in the passage cited above Aristotle uses the term "parts." These are, (1) the nutritive, the power of life whereby the body performs such functions as absorbing nourishment, propagating its species, and other functions common to all living beings, whether animal or vegetable: (ii) the sensible, by which the body obtains knowledge through the medium of the special senses of sight, hearing, touch, etc., and also the "common sense" by means of which these perceptions are combined, compared, and contrasted so that general ideas are obtained which ultimately rest on the sense perceptions: (iii) the locomotive, which prompts to action, as desire, appetite, will, etc., also The neo-Platonic school was founded by Ammonius Saccas, but really takes its definite form under Plotinus (d. 269 A.D.). In sketching in brief outline the leading principles of this system we shall confine ourselves to the last three books of the Enneads (iv-vi) as these, in the abridged form known as the "Theology of Aristotle" formed the main statement of neo-Platonic doctrine known to the Muslim world. In the teaching of Plotinus God is the Absolute, the First Potency (Enn. 5. 4. 1.), beyond the sphere of existence (id. 5. 4. 2.), and beyond reality, that is to say, all that we know as existence and being is inapplicable to him, and he is therefore unknowable, because on a plane which is altogether beyond our thought. He is unlimited and infinite (id. 6. 5. 9.) and consequently One, as infinity excludes From the true God, the eternal Absolute, proceeds From the nous proceeds the psyche, the principle of life and motion, the world soul which is in the universe and which is shared by every living creature. It also knows, but only through the processes of reasoning, by means of separating, distributing, and combining the data obtained by sense perception, so that it corresponds in function to the "common sense" of Aristotle, whilst the nous shows the functions which are attributed to it by Aristotle and has the character which Alexander reads into Aristotle. This second controversy resulted in the Council of Chalcedon in A.D. 448, at which the advocates of the theory of "fusion" were expelled from the state church, and thus a third body was formed, each of the three claiming to represent the true faith. Practically the whole of the Egyptian Church followed the When we consider the results of the Monophysite and Nestorian schisms we begin to understand why so much Greek philosophical material was translated into Syriac, whilst the Nestorian movement was the effective reason why Syriac gradually became the medium for transmitting Hellenistic culture into the parts of Asia which lay beyond the confines of the Byzantine Empire during the centuries immediately Athanasius of Balad who became Monophysite patriarch in 684 was a pupil of Severus Sekobt, and is chiefly known as the translator of a new Syriac version of Porphyry's Isagoge (Vatican Ms. Syr. 158. cf. Bar Hebraeus Chron. Eccles. ed. Abbeloos et Lamy. i. 287). James of Edessa (d. 708 A.D.) also was a pupil of Severus Sebokt at the same convent, was made bishop of Edessa about 684 and abandoned this see in 688 as the result of his failure to carry out the reformation of the monasteries in his diocese: he retired to the monastery of St. James at Kaishun, between Aleppo and Edessa, but left this to become lecturer at the monastery of Eusebona, in the diocese of Antioch where "for eleven years he taught the psalms and the reading of the scriptures in Greek and revived the Greek language which had fallen into disuse" (Bar Hebr. Chron. Eccles. i. 291). Attacked These names cover the whole period between the two schisms and the Muslim invasion and suffice to show that the Syriac speaking community continued diligent in the study of the Aristotelian logic and metaphysics, and also gave attention to medical and scientific studies. It is not exactly a brilliant or original form of cultural activity, for the most part it was only the transmission of received texts with the preparation of new translations, commentaries, and explanatory treatises, but this itself fulfilled an important function. The Muslim invasion made no change in the course of these studies: the Umayyads did not interfere with the schools and the Syriac students went their own way living a life quite apart from that of their Arab rulers. Now and then unscrupulous or angry clergy appealed to the Khalif Mar Abha III. became Nestorian Catholicos somewhere about 740 (133 A.H.) and produced a commentary on Aristotle's logic (cf. Bar Heb. ii. 153). This brings us down to the period when the Muslim world began to take an interest in these philosophical and scientific studies, and translations and commentaries began to appear in Arabic. But Syriac studies did not at once disappear and it will be convenient to enumerate briefly some of those who appeared in The series of Syriac philosophical writers closes with Gregory Bar Hebraeus, or Abu l-Faraj in the thirteenth century A.D. whose "Book of the Pupils of the Eyes" is a compendium of logic summarising and explaining the Isagoge, and Aristotle's Categories, Hermeneutica, Analytica, Topica, and Sophistica Elenchi; his "Book of the Upholding of Wisdom" being a summary introduction to logic, physics, metaphysics, and theology. A third work "The Cream of Science" is an encyclopædia of the Aristotelian philosophy, and this work appears also in an abridged form as the "Business of Businesses." He was also the translator into Syriac of Dioscorus on simples, and author of a treatise on the medical Questions of Hunayn b. Ishaq, and of a work on geography called "the Ascent of the Spirit." Although esteemed as one of the greatest Syriac authorities and for centuries holding a (i) The Nestorians who hold the first place as the earliest teachers of the Muslims and the most important transmittors of medicine. (ii) The Jacobites or Monophysites who were the chief influences in introducing neo-Platonic speculations and mysticism. (iii) The Zoroastrians of Persia and especially the school of Junde-Shapur, although this had a strong Nestorian element. (iv) The Pagans of Harran who came forward at a later stage. (v) The Jews who, in this connection, occupy a somewhat peculiar position: they had no contact with the tradition of Aristotelian philosophy, their academies at Sora and Pumbaditha were concerned with their own traditional law and Bible exegesis only. Jewish philosophical studies began later and were themselves derived from the Arabic philosophers. But they shared with the Nestorians an inclination towards medical studies so that Jewish physiciansTHE SYRIAC VERSION OF HELLENISM