A History of Mediaeval Jewish Philosophy Part 17

As the n.o.blest part of man is his soul, it becomes his duty to know it.

He must know whether it is substance or accident, whether it will die when it is separated from the body, and for what purpose it was brought into union with the body. In order to learn all this one must first study the preparatory branches, grammar, logic, mathematics and physics.

In the study of psychology we learn that man has three souls, vegetative, animal and rational, and the latter alone is immortal. It is a part of the world soul, having existed before it came into the body, and under favorable conditions will return again to the world soul when separated from the body. The condition which must be fulfilled by the soul before it can return to the world soul is the acquisition of wisdom, for this is the purpose for which it was put into the body, namely, in order that it may learn the work of its master and observe his commandments. There are many sciences, but they are related to each other, all leading up to the one highest science, the knowledge of G.o.d and his goodness. A person must advance gradually in studying the work of G.o.d from the knowledge of minerals, plants, animals, the human body, to the knowledge of the spheres and heavenly bodies, the causes of eclipses, etc., and from this he will gradually come to know G.o.d. The commandments of the Bible are also of importance for this purpose. To understand the secret of the commandments is to gain eternal life. For wisdom is the form of the soul, and hence the soul does not die like a body.

The reward of the soul is re-absorption in the world soul of which it is a part, and the punishment of the unworthy soul that neglected to acquire knowledge is destruction. What Ibn Ezra means by the Hebrew word "abad" (ordinarily rendered to perish, to be destroyed) is not clear. It is hard to see how a pre-existing soul can perish utterly. Rosin suggests that Ibn Ezra is alluding to transmigration,[217] but it is not clear.

We have seen that Ibn Ezra holds that the events of the sublunar world and the destinies of men are governed by the positions and motions of the heavenly bodies, which in turn are determined by the Intelligences or angels. The heavenly bodies, he tells us, follow necessary laws imposed upon them, and are not responsible for any good or evil which results to mankind from them, since the effects are not of their intention, and they cannot change them if they would. Accordingly it is foolish to pray to the heavenly bodies in order to appease them and prevent evil, as some of the heathen are accustomed to do. The motions of the heavenly bodies are determined and invariable, and no prayer will change them. This, however, does not mean to say that no one can escape the evil which is destined for him in the stars. Ordinarily, it is true, G.o.d does not know the particular individual as such. He knows him only as implied in the whole, and his destiny is determined accordingly. But there are exceptions when a person by developing his soul and intellect, as we saw above, succeeds in his lifetime in separating his soul from the corporeal and particular, and brings it into contact with the spiritual and universal. In that case he attracts to himself the special providence of G.o.d, which enables him to evade the evil threatened by his star, without in any way changing the star's natural course or ordinary effects. How this is done, Ibn Ezra ill.u.s.trates by an example.[218]

Suppose, he says, that it is fated according to the stars that a given city shall be flooded by a river and its inhabitants drowned. A prophet comes and warns them, urging them to repent of their evil ways before their fate is sealed. They obey him, return to G.o.d with all their heart and leave the city to offer prayer to G.o.d. The river rises in their absence, as often happens, and floods the city. The wolf is satisfied and the lamb is whole. The decree of the stars is not interfered with, and the good man is delivered from evil. In this way Ibn Ezra endeavors to reconcile natural law (or astrological fatalism) with the ethical purpose of divine providence. And he also vindicates free will and responsibility. The rational soul of man has power, he says, to counteract in part the indications of the stars, though it cannot annul them entirely. The punishment of the wicked is that they are left entirely to the fates determined for them by their constellations.

The highest good of man, we have seen, is the knowledge of G.o.d and his work. There are two ways of knowing G.o.d. One is through a study of nature, the work of G.o.d. This is described in the first part of the nineteenth Psalm, "The Heavens declare the glory of G.o.d; and the firmament showeth his handiwork." But there is a second and, in a sense, a better way of knowing G.o.d. This is derived from his revelation in the Law. As we are told in the second part of the above Psalm (_v._ 7), "The law of the Lord is perfect, restoring the soul." The law of the Lord restores the soul, Ibn Ezra says, by removing doubt from it. For the first method of knowing G.o.d, with all its importance for the man of wisdom and reason, is not fit for all persons; and not everything can be proved by reason. Revelation in the Law is necessary for the simple minded. "I am the Lord thy G.o.d" (Exod. 20, 2) is a hint to the philosopher, who need not depend on hearsay, for real knowledge is proved knowledge. But as not everyone is in a position to have such knowledge, the Bible adds, "which brought thee out of the land of Egypt." This all can understand, the simple minded as well as the philosopher. The Law has also a practical purpose, to strengthen the rational soul so as to prevent the body from gaining the upper hand.

G.o.d's messenger, through whom his will is made known, is the prophet. He seeks retirement so as to get in communion with G.o.d, and receives such influence as he is capable of getting. Moses was the greatest of the prophets. He was able to communicate with G.o.d whenever he chose, whereas the others had to wait until the inspiration came. The revelation of G.o.d to Moses was without an intermediary, and without visions and likenesses. Moses saw the things presented to him in their true form.

The laws may be divided into 1. Innate or rational laws, _i. e._, laws planted by G.o.d in the mind of every rational being. There are many such in the Torah. All the laws of the Ten Commandments belong to this cla.s.s, with the exception of the Sabbath. Hence all mankind believe in them, and Abraham observed them all before ever the Law was given on Sinai. 2.

Hidden laws, _i. e._, laws, the reason of which is not given. We must not suppose for a moment that there is any law which is against reason, Heaven forbid! We must observe them all, whether we understand the reason or not. If we find a law that apparently is unreasonable, we must a.s.sume that it has some hidden meaning and is not to be taken in its literal sense. It is our duty, then, to look for this hidden meaning, and if we cannot find it, we must admit that we do not understand it.

The laws may also be cla.s.sified as 1. Commandments of the heart, 2.

Commandments of the tongue, and 3. Commandments of action. An example of commandments of the heart is, "Thou shalt love the Lord thy G.o.d," "Thou shalt not hate thy brother in thy heart," and so on. To the commandments of the tongue belong the reading of the _Shema_, grace after meals, the priestly benediction, and so on. The laws of the third cla.s.s are so numerous that there is no need of mentioning them. The laws of the heart are the most important of all. The reader will recognize in this two-fold cla.s.sification Saadia's division of the laws into rational and traditional, and Bahya's cla.s.sification of duties of the heart and duties of the limbs. This second cla.s.s includes Ibn Ezra's second and third cla.s.ses, tongue and action.[219]

The problem of evil Ibn Ezra solves by saying that from G.o.d comes good only. The world as a whole is good; evil is due to the defect of the object receiving higher influence. To argue that because of the small part of evil the whole world, which is good, should not have been created, is foolish.

The highest good of man is to develop his reason. As the traveller and the captive long to return to the land of their birth and be with their family, so the rational soul is eager to rise to the upper world which is not made of clay. This it can do only if it purifies itself from the uncleanness of corporeal desire which drags it down, and takes pains to know its own nature and origin, with the help of Wisdom whose eyes are undimmed. Then she will know the truth, which will remain indelibly impressed upon her when she separates from the body, where she was put for her own good. The suffering she underwent here for a time will give place to everlasting rest and joy. All man's work is vain, for man can neither create nor annihilate a substance. All his corporeal activity consists in combination and separation of accidents. The only thing of value is the fear of G.o.d. But no man can rise to this stage until he has ascended the ladder of wisdom, and has acquired understanding.[220]

More concretely the way to purify the soul from the body is by uniting the rational and spirited soul, as Plato has it, against the appet.i.tive, and giving the reason the mastery over the spirited soul as well. A moderate degree of asceticism is to be recommended as favoring the emanc.i.p.ation of the soul from the tyranny of the body. This is the meaning of the inst.i.tution of the n.a.z.irite; and the offering he must bring after the expiration of his period is to atone for the sin of returning to a life of indulgence. But one should not go to extremes.

Too much praying and fasting results in stupefaction. It is a mistake to develop one side of one's nature at the expense of another. Every one of the three souls (the rational, the spirited and the appet.i.tive) must be given its due.

But the most important activity of man, which leads to eternal life and happiness, is the knowledge of G.o.d. This knowledge cannot be attained at once. It must be preceded by a study of one's own soul and of the natural sciences. Through a knowledge of oneself and nature, one arrives finally at a knowledge of G.o.d. The soul, originally a _tabula rasa_, is gradually perfected by the ideas which theoretical speculation acquires.

These ideas are identified with the rational soul, and there results the acquired Intellect, which, as absolutely immaterial, is immortal and becomes one with the world soul of which it is a part. During life complete union with the spiritual world is impossible. Even Moses could only see the "rear part" of G.o.d. But when one has during life kept as far as possible away from the sensuous and corporeal, then at the time of death, when the soul is separated from the body, he will be completely absorbed in the world soul and possess the knowledge of G.o.d.

CHAPTER XII

ABRAHAM IBN DAUD

What was poison to Judah Halevi is meat to Abraham Ibn Daud. We must, he says, investigate the principles of the Jewish religion and seek to harmonize them with true philosophy. And in order to do these things properly a preliminary study of science is necessary. Nowadays all this is neglected and the result is confusion in fundamental principles, for a superficial and literal reading of the Bible leads to contradictory views, not to speak of anthropomorphic conceptions of G.o.d which cannot be the truth. Many of our day think that the study of philosophy is injurious. This is because it frequently happens in our time that a person who takes up the study of philosophy neglects religion. In ancient times also this happened in the person of Elisha ben Abuya, known by the name of Aher. Nevertheless science was diligently studied in Rabbinic times. Witness what was said concerning Rabbi Yohanan ben Zakkai, Samuel and the Synhedrin.[221] It cannot be that G.o.d meant us to abstain from philosophical study, for many statements in the Bible, such as those relating to freedom of the will, to the nature of G.o.d and the divine attributes, to the creation of the world, and so on, are a direct stimulus to such investigation. Surely mental confusion cannot be the purpose G.o.d had in mind for us. If he preferred our ignorance he would not have called our attention to these matters at all.[222]

This, as we see, is decidedly a different point of view from that of Judah Halevi. The difference between them is not due to a difference in their age and environment, but solely to personal taste and temperament.

Toledo was the birthplace of Ibn Daud as it was of Halevi. And the period in which they lived was practically the same. Judah Halevi's birth took place in the last quarter of the eleventh century, whereas Ibn Daud is supposed to have been born about 1110, a difference of some twenty-five or thirty years. The philosopher whom Judah Halevi presents to us as the typical representative of his time is an Aristotelian of the type of Alfarabi and Avicenna. And it is the same type of philosophy that we meet in the pages of the "Emunah Ramah" (Exalted Faith), Ibn Daud's philosophical work.[223] Whereas, however, Judah Halevi was a poet by the grace of G.o.d, glowing with love for his people, their religion, their language and their historic land, Ibn Daud leaves upon us the impression of a precise thinker, cold and a.n.a.lytical. He exhibits no graces of style, eloquence of diction or depths of enthusiasm and emotion. He pa.s.ses systematically from one point to the next, uses few words and technical, and moves wholly in the Peripatetic philosophy of the day. In 1161, the same year in which the Emunah Ramah was composed, he also wrote a historical work, "Sefer Hakabala" (Book of Tradition), which we have; and in 1180, regarded by some as the year of his death, he published an astronomical work, which is lost. This gives an index of his interests which were scientific and philosophic. Mysticism, whether of the poetic or the philosophic kind, was far from his nature; and this too may account for the intense opposition he shows to Solomon Ibn Gabirol. On more than one occasion he gives vent to his impatience with that poetic philosopher, and he blames him princ.i.p.ally for two faults.

Choosing to devote a whole book to one purely metaphysical topic, in itself not related to Judaism, Gabirol, we are told by Ibn Daud, gave expression to doctrines extremely dangerous to the Jewish religion. And apart from his heterodoxy, he is philosophically incompetent and his method is abominable. His style is profuse to the point of weariness, and his logic carries no conviction.[224]

While Abraham Ibn Daud is thus expressly unsympathetic to Gabirol and tacitly in disagreement with Halevi (he does not mention him), he shows the closest relation to Maimonides, whose forerunner he is. We feel tempted to say that if not for Ibn Daud there would have been no Maimonides. And yet the irony of history has willed that the fame of being the greatest Jewish philosopher shall be Maimonides's own, while his nearest predecessor, to whose influence he owed most, should be all but completely forgotten. The Arabic original of Ibn Daud's treatise is lost, and the Hebrew translations (there are two) lay buried in ma.n.u.script in the European libraries until one of them was published by Simson Weil in 1852.[225]

Abraham Ibn Daud is the first Jewish philosopher who shows an intimate knowledge of the works of Aristotle and makes a deliberate effort to harmonize the Aristotelian system with Judaism. To be sure, he too owes his Aristotelian knowledge to the Arabian exponents of the Stagirite, Alfarabi and Avicenna, rather than to the works of Aristotle himself.

But this peculiarity was rooted in the intellectual conditions of his time, and must not be charged to his personal neglect of the sources.

And Maimonides does nothing more than repeat the effort of Ibn Daud in a more brilliant and masterly fas.h.i.+on.

The development of the three religious philosophies in the middle ages, Jewish, Christian and Mohammedan, followed a similar line of progression. In all of them it was not so much a development from within, the unfolding of what was implicit and potential in the original germ of the three respective religions, as a stimulus from without, which then combined, as an integral factor, with the original ma.s.s, and the final outcome was a resultant of the two originally disparate elements. We know by this time what these two elements were in each case, h.e.l.lenic speculation, and Semitic religion in the shape of sacred and revealed doc.u.ments. The second factor was in every case complete when the process of fusion began. Not so the first. What I mean is that not all of the writings of Greek antiquity were known to Jew, Christian and Mohammedan at the beginning of their philosophizing career. And the progress in their philosophical development kept equal step with the successive accretion of Greek philosophical literature, in particular Aristotle's physical, psychological and metaphysical treatises, and their gradual purgation of Neo-Platonic adhesions.

The Syrian Christians, who were the first to adopt Greek teachings, seem never to have gone beyond the mathematical and medical works of the Greeks and the logic of Aristotle. The Arabs began where their Syrian teachers ended, and went beyond them. The Mutakallimun were indebted to the Stoics,[226] the Pure Brethren to the Neo-Platonists; and it was only gradually that Aristotle became the sole master not merely in logic, which he always had been, but also in physics, metaphysics and psychology. Alfarabi, Avicenna and Averroes represent so many steps in the Aristotelization of Arabic philosophy.

Christian mediaeval thought, which was really a continuation of the Patristic period, likewise began with Eriugena in the ninth century under Platonic and Neo-Platonic influences. Of Aristotle the logic alone was known, and that too only in small part. Here also progress was due to the increase of Aristotelian knowledge; though in this case it was not gradual as with the Arabs before them, but sudden. In the latter part of the twelfth and the early part of the thirteenth century, through the Crusades, through the Moorish civilization in Spain, through the Saracens in Sicily, through the Jews as translators and mediators, Aristotle invaded Christian Europe and transformed Christian philosophy.

Albertus Magnus, Thomas Aquinas, Duns Scotus, William of Occam are the results of this transformation.

The same thing holds true of the Jews. Their philosophizing career stands chronologically between that of their Arab teachers and their Christian disciples. And the line of their development was similar. It was parallel to that of the Arabs. First came Kalam in Saadia, Mukammas, the Karaites Al Basir and Jeshua ben Judah. Then Neo-Platonism and Kalam combined, or pure Neo-Platonism, in Bahya, Gabirol, Ibn Zaddik and the two Ibn Ezras, Abraham and Moses. In Judah Halevi, so far as philosophy is represented, we have Neo-Platonism and Aristotelianism. Finally in Ibn Daud and Maimonides, Neo-Platonism is reduced to the vanis.h.i.+ng point, and Aristotelianism is in full view and in possession of the field. After Maimonides the only philosopher who deviates from the prescribed path and endeavors to uproot Aristotelian authority in Judaism is Crescas. All the rest stand by Aristotle and his major domo, Maimonides.

This may seem like a purely formal and external mode of characterizing the development of philosophical thought. But the character of mediaeval philosophy is responsible for this. Their ideal of truth as well as goodness was in the past. Knowledge was thought to have been discovered or revealed in the past,[227] and the task of the philosopher was to acquire what was already there and to harmonize contradictory authorities. Thus the more of the past literature that came to them, the greater the transformation in their own philosophy.

The above digression will make clear to us the position of Ibn Daud and his relation to Maimonides. Ibn Daud began what Maimonides finished--the last stage in the Aristotelization of Jewish thought. Why is it then that so little was known about him, and that his important treatise was neglected and practically forgotten? The answer is to be found partly in the nature of the work itself and partly in historical circ.u.mstances.

The greatest and most abiding interest in intellectual Jewry was after all the Bible and the Talmud. This interest never flagged through adversity or through success. The devotion paid to these Jewish cla.s.sics and sacred books may have been fruitful in original research and intelligent application at one time and place and relatively barren at another. Great men devoted to their study abounded in one country and were relatively few in another. The nature of the study applied to these books was affected variously by historical conditions, political and economic; and the cultivation or neglect of the sciences and philosophy was reflected in the style of Biblical and Talmudical interpretation.

But at all times and in all countries, under conditions of comparative freedom as well as in the midst of persecution, the sacred heritage of Israel was studied and its precepts observed and practiced. In this field alone fame was sure and permanent. All other study was honored according to the greater or less proximity to this paramount interest.

In times of freedom and of great philosophic and scientific interest like that of the golden era in Spain, philosophical studies almost acquired independent value. But this independence, never quite absolute, waned and waxed with external conditions, and at last disappeared entirely. If Ibn Daud had made himself famous by a Biblical commentary or a halakic work, or if his philosophic treatise had the distinction of being written in popular and attractive style, like Bahya's "Duties of the Hearts," or Halevi's "Cusari," it might have fared better. As it is, it suffers from its conciseness and technical terminology. Add to this that it was superseded by the "Guide of the Perplexed" of Maimonides, published not many years after the "Emunah Ramah," and the neglect of the latter is completely explained.

Abraham ibn Daud tells us in the introduction to his book that it was written in response to the question of a friend concerning the problem of free will. The dilemma is this. If human action is determined by G.o.d, why does he punish, why does he admonish, and why does he send prophets?

If man is free, then there is something in the world over which G.o.d has no control. The problem is made more difficult by the fact that Biblical statements are inconsistent, and pa.s.sages may be cited in favor of either of the theories in question. This inconsistency is to be explained, however, by the circ.u.mstance that not all Biblical phrases are to be taken literally--their very contradiction is a proof of this.

Now the pa.s.sages which require exegetic manipulation are in general those which seem opposed to reason. Many statements in the Bible are in fact intended for the common people, and are expressed with a view to their comprehension, and without reference to philosophic truth. In the present instance the objections to determinism are much greater and more serious than those to freedom. In order to realize this, however, it is necessary to investigate the principles of the Jewish religion and seek to harmonize them with true philosophy. This in turn cannot be done without a preliminary study of science. A question like that of determinism and freedom cannot be decided without a knowledge of the divine attributes and the consequences flowing from them. But to understand these we must have a knowledge of the principles of physics and metaphysics.[228] Accordingly Abraham Ibn Daud devotes the entire first part of the "Emunah Ramah" to general physics and metaphysics in the Aristotelian conception of these terms.

Concerning the kind of persons for whom he wrote his book, he says, I advise everyone who is perfectly innocent, who is not interested in philosophical and ethical questions like that of determinism and freedom on the ground that man cannot grasp them; and is entirely unconcerned about his ignorance--I advise such a person to refrain from opening this book or any other of a similar nature. His ignorance is his bliss, for after all the purpose of philosophy is conduct. On the other hand, those who are learned in the principles of religion and are also familiar with philosophy need not my book, for they know more than I can teach them here. It is the beginner in speculation who can benefit from this work, the man who has not yet been able to see the rational necessity of beliefs and practices which he knows from tradition.

That the principles of the Jewish religion are based upon philosophic foundations is shown in Deuteronomy 4, 6: "Keep therefore and do them; for this is your wisdom and your understanding in the sight of the peoples, which shall hear all these statutes, and say, surely this great nation is a wise and understanding people." This cannot refer to the ceremonial precepts, the so-called "traditional" commandments; for there is nothing in them to excite the admiration of a non-Jew. Nor can it refer to the political and moral regulations, for one need not profess the Jewish or any other religion in order to practice them; they are a matter of reason pure and simple. The verse quoted can only mean that the other nations will be seized with admiration and wonder when they find that the fundamental principles of the Jewish religion, which we received by tradition and without effort, are identical with those philosophical principles at which they arrived after a great deal of labor extending over thousands of years.[229]

Ibn Daud is not consistent in his idea of the highest aim of man. We have just heard him say that the purpose of philosophy is conduct. This is true to the spirit of Judaism which, despite all the efforts of the Jewish philosophers to the contrary, is not a speculative theology but a practical religion, in which works stand above faith. But as an Aristotelian, Ibn Daud could not consistently stand by the above standpoint as the last word in this question. Accordingly we find him elsewhere in true Aristotelian fas.h.i.+on give priority to theoretical knowledge.

Judging from the position of man among the other creatures of the sublunar world, we come to the conclusion, he tells us, that that which distinguishes him above his surroundings, namely, his rational soul, is the aim of all the rest; and they are means and preparations for it. The rational soul has two forms of activity. It may face upward and receive wisdom from the angels (theoretical knowledge). Or it may direct its attention downwards and judge the other corporeal powers (practical reason). But it must not devote itself unduly or without system to any one occupation. The aim of man is wisdom, science. Of the sciences the highest and the aim of all the rest is the knowledge of G.o.d. The body of man is his animal, which leads him to G.o.d. Some spend all their time in feeding the animal, some in clothing it, and some in curing it of its ills. The latter is not a bad occupation, as it saves the body from disease and death, and so helps it to attain the higher life. But to think of the study of medicine as the aim of life and devote all one's time to it is doing injury to one's soul. Some spend their time in matters even less significant than this, _viz._, in studying grammar and language; others again in mathematics and in solving curious problems which are never likely to happen. The only valuable part here is that which has relation to astronomy. Some are exclusively occupied in "twisting threads." This is an expression used by an Arabian philosopher,[230] who compares man's condition in the world to that of a slave who was promised freedom and royalty besides if he made the pilgrimage to Mecca and celebrated there. If he made the journey and was prevented from reaching the holy city, he would get freedom only; but if he did not undertake the trip he would get nothing. The three steps in the realization of the purpose are thus: making the preparations for the journey, getting on the road and pa.s.sing from station to station, and finally wandering about in the place of destination. One small element in the preparation for the journey is twisting the threads for the water bottle. Medicine and law as means of gaining a livelihood and a reputation represent the stage of preparing for the journey. They are both intended to improve the ills of life, whether in the relations of man to man as in law; or in the treatment of the internal humors as in medicine. Medicine seems more important, for on the a.s.sumption of mankind being just, there would be no need of law, whereas the need for medicine would remain. To spend one's whole life in legal casuistry and the working out of hypothetical cases on the pretext of sharpening one's wits, is like being engaged in twisting threads continually--a little is necessary, but a great deal is a waste of time. It would be best if the religious man would first learn how to prove the existence of G.o.d, the meaning of prophecy, the nature of reward and punishment and the future world, and how to defend these matters before an unbeliever. Then if he has time left, he may devote it to legalistic discussions, and there would be no harm.

Self-examination, in order to purify oneself from vices great and small, represents the second stage of getting on the road and travelling from station to station. The final stage, arriving in the holy city and celebrating there, is to have a perfect knowledge of G.o.d. He who attains this is the best of wise men, having the best of knowledge, which deals with the n.o.blest subject. The reader must not expect to find it all in this book. If he reads this and does not study the subject for himself, he is like a man who spent his time in reading about medicine and cannot cure the simplest ailment. The knowledge of G.o.d is a form that is bestowed from on high upon the rational soul when she is prepared by means of moral perfection and scientific study. The prophet puts all three functions of the soul on the same level, and gives preference to knowledge of G.o.d. "Thus saith the Lord," says Jeremiah (9, 22), "Let not the wise man glory in his wisdom [rational soul], neither let the mighty man glory in his might [spirited soul], let not the rich man glory in his riches [nutritive soul]: but let him that glorieth glory in this, that he understandeth, and knoweth me...." Jeremiah also recommends (_ib._) knowing G.o.d through his deeds--"That I am the Lord which exercise loving-kindness"--in order that man may imitate him.[231]

We have now a general idea of Ibn Daud's att.i.tude and point of view; and in pa.s.sing to the details of his system it will not be necessary to rehea.r.s.e all the particulars of his thought, much of it being common to all mediaeval writers on Jewish philosophy. We shall confine ourselves to those matters in which Ibn Daud contributed something new, not contained in the writings of his predecessors.

Following the Aristotelian system, he begins by describing substance and accident and gives a list and characterization of the ten categories.

This he follows up by showing that the cla.s.sification of the ten categories lies at the basis of the 139th Psalm. It needs not our saying that it must be an extraordinary mode of exegesis that can find such things in such unusual places. But the very strangeness of the phenomenon bears witness to the remarkable influence exerted by the Aristotelian philosophy upon the thinking of the Spanish Jews at that time.[232]

From the categories he pa.s.ses to a discussion of the most fundamental concepts in the Aristotelian philosophy, matter and form. And here his method of proving the existence of matter is Aristotelian and new. It is based upon the discussion in Aristotle's Physics, though not necessarily derived from there directly. Primary matter, he says, is free from all form. There must be such, for in the change of one thing to another, of water to air for example, it cannot be the _form_ of water that receives the form of air; for the form of water disappears, whereas that which receives the new form must be there. Reason therefore leads us to a.s.sume a common substrate of all things that are subject to change. This is primary matter, free from all form. This matter being at the basis of all change and becoming, could not itself have come to be through a similar process, or we should require another matter prior to it, and it would not be the prime matter we supposed it to be. This last argument led Aristotle to the concept of an eternal matter, the basis of becoming for all else besides, itself not subject to any such process. It is an ultimate, to ask for the origin of which would signify to misunderstand the meaning of origin. All things of the sublunar world originate in matter, hence matter itself is the unoriginated, the eternal.

Ibn Daud as a Jew could not accept this solution, and so he cut the knot by saying that while it is true that matter cannot originate in the way in which the composite objects of the sublunar world come to be, it does not yet follow that it is absolutely ultimate and eternal. G.o.d alone is the ultimate and eternal; nothing else is. Matter is a relative ultimate; relative, that is, to the composite and changeable objects of our world; but it is itself an effect of G.o.d as the universal cause. G.o.d created it outright.

Prime matter, therefore, represents the first stage in creation. The next stage is the endowment of this formless matter with corporeality in the abstract, _i. e._, with extension. Then come the specific forms of the four elements, then their compounds through mineral, plant and animal to man. This is not new; we have already met with it in Gabirol and Ibn Zaddik. Nor is the following significant statement altogether new, though no one before Ibn Daud expressed it so clearly and so definitely. It is that the above a.n.a.lysis of natural objects into matter, universal body, the elements, and so on, is not a physical division but a logical. It does not mean that there was a time when prime matter actually existed as such before it received the form of corporeality, and then there existed actually an absolute body of pure extension until it received the four elements. No, nothing has existence _in actu_ which has not individuality, including not only form, but also accidents. The above a.n.a.lysis is theoretical, and the order of priority is logical not real. In reality only the complete compound of matter and form (the individual) exists.

Allusion to matter and form is also found in the Bible in Jeremiah (18, 1ff.), "Arise and go down to the potter's house.... Then I went down to the potter's house, and, behold, he wrought his work on the wheels....

Behold as the clay in the potter's hand...."[233]

The next important topic a.n.a.lyzed by Ibn Daud is that of motion. This is of especial importance to Ibn Daud because upon it he bases a new proof of the existence of G.o.d, not heretofore found in the works of any of his predecessors. It is taken from Aristotle's Physics, probably from Avicenna's treatises on the subject, is then adopted by Maimonides, and through his example no doubt is made use of by Thomas Aquinas, the great Christian Scholastic of the thirteenth century, who gives it the most prominent place in his "Summa Contra Gentiles."

Ibn Daud does not give Aristotle's general definition of motion as the "actualization of the potential qua potential" (_cf._ above, p. x.x.xii), but his other remarks concerning it imply it. Motion, he says, is applied first to movement in place, and is then transferred to any change which is gradual, such as quant.i.tative or qualitative change.

Sudden change is not called motion. As the four elements have all the same matter and yet possess different motions--earth and water moving downward, fire and air upward--it cannot be the matter which is the cause of their motions. It must therefore be the forms, which are different in different things.