Guide for the Perplexed, by Moses Maimonides, Friedländer tr. [1904], at sacred-texts.com
ARISTOTLE and all philosophers assume as an axiom that a simple element can only produce one simple thing, whilst a compound can produce as many things as it contains simple elements; e.g., fire combines in itself two properties, heat and dryness: it gives heat by the one property, and produces dryness by the other: an object composed of matter and form produces certain things on account of its matter, and others on account of its form, if [both matter and form] consist of several elements. In accordance with this axiom, Aristotle holds that the direct emanation from God must be one simple Intelligence, and nothing else.
A second axiom assumed by him is this: Things are not produced by other things at random; there must be some relation between cause and effect. Thus accidents are not produced by accidents promiscuously; quality cannot be the origin of quantity, nor quantity that of quality; a form cannot emanate from matter, nor matter from form.
A third axiom is this: A single agent that acts with design and will, and not merely by the force of the laws of Nature, can produce different objects.
A fourth axiom is as follows: An object, whose several elements are only connected by juxtaposition, is more properly a compound than an object whose different elements have entirely combined; e.g., bone, flesh, veins, or nerves, are more simple than the hand or the foot, that are a combination of bone, flesh, veins, and nerves. This is very clear, and requires no further explanation.
Having premised these axioms, I ask the following question: Aristotle holds that the first Intelligence is the cause of the second, the second of the third, and so on, till the thousandth, if we assume a series of that number. Now the first Intellect is undoubtedly simple. How then can the compound form of existing things come from such an Intellect by fixed laws of Nature, as Aristotle assumes? We admit all he said concerning the Intelligences, that the further they are away from the first, the greater is the variety of their compounds, in consequence of the larger number of the objects comprehensible by the Intelligences: but even after admitting this, the question remains, By what law of Nature did the spheres emanate from the Intelligences? What relation is there between material and immaterial beings? Suppose we admit that each sphere emanates from an Intelligence of the form mentioned; that the Intelligence, including, as it were, two elements, in so far as it comprehends itself and another thing, produces the next Intelligence by the one element, and a sphere by the other; but the question would then be, how the one simple element could produce the sphere, that contains two substances and two forms, namely, the substance and the form of the sphere, and also the substance and the form of the star fixed in that sphere. For, according to the laws of Nature, the compound can only emanate from a compound. There must therefore be one element, from which the body of the sphere emanates, and another element, from which the body of the star emanates. This would be necessary even if the substance of all stars were the same; but it is possible that the luminous stars have not the same substance as the non-luminous stars; it is besides well known that each body has its own matter and its own form. It must now be clear that this emanation could not have taken place by the force of the laws of Nature, as Aristotle contends. Nor does the difference of the motions of the spheres follow the order of their positions: and therefore it cannot be said that this difference is the result of certain laws of Nature. We have already mentioned this (ch. xix.).
There is in the properties of the spheres another circumstance that is opposed to the assumed laws of Nature; namely, if the substance of all spheres is the same, why does it not occur that the form of one sphere combines with the substance of another sphere, as is the case with things on earth, simply because their substance is fit [for such changes]? If the substance of all spheres is the same, if it is not assumed that each of them has a peculiar substance, and if, contrary to all principles, the peculiar motion of each sphere is no evidence for the special character of its substance, why then should a certain form constantly remain united with a certain substance? Again, if the stars have all one substance, by what are they distinguished from each other? is it by forms? or by accidents? Whichever be the case, the forms or the accidents would interchange, so that they would successively unite with every one of the stars, so long as their substance [being the same] admits the combinations [with every one of the forms or the accidents]. This shows that the term substance, when used of the spheres or the stars, does not mean the same as it signifies when used of the substance of earthly things, but is applied to the two synonymously. It further shows that every one of the bodies of the spheres has its own peculiar form of existence different from that of all other
beings. Why then is circular motion common to all spheres, and why is the fixed position of the stars in their respective spheres common to all stars? If we, however, assume design and determination of a Creator, in accordance with His incomprehensible wisdom, all these difficulties disappear. They must arise when we consider the whole Universe, not as the result of free will, but as the result of fixed laws of Nature: a theory which, on the one hand, is not in harmony with the existing order of things, and does not offer for it a sufficient reason or argument; and, on the other hand, implies many and great improbabilities. For, according to this theory God, whose perfection in every respect is recognised by all thinking persons, is in such relation to the Universe that He cannot change anything; if He wished to make the wing of a fly longer, or to reduce the number of the legs of a worm by one, He could not accomplish it. According to Aristotle, He does not try such a thing, and it is wholly impossible for Him to desire any change in the existing order of things; if He could, it would not increase His perfection: it might, on the contrary, from some point of view, diminish it.
Although I know that many partial critics will ascribe my opinion concerning the theory of Aristotle to insufficient understanding, or to intentional opposition, I will not refrain from stating in short the results of my researches, however poor my capacities may be. I hold that the theory of Aristotle is undoubtedly correct as far as the things are concerned which exist between the sphere of the moon and the centre of the earth. Only an ignorant person rejects it, or a person with preconceived opinions of his own, which he desires to maintain and to defend, and which lead him to ignore clear facts. But what Aristotle says concerning things above the sphere of the moon is, with few exceptions, mere imagination and opinion; to a still greater extent this applies to his system of Intelligences, and to some of his metaphysical views; they include great improbabilities, [promote] ideas which all nations consider as evidently corrupt, and cause views to spread which cannot be proved.
It may perhaps be asked why I have enumerated all the doubts which can be raised against the theory of Aristotle; whether by mere doubts a theory can be overthrown, or its opposite established? This is certainly not the case. But we treat this philosopher exactly as his followers tell us to do. For Alexander stated that when a theory cannot be established by proof, the two most opposite views should be compared as to the doubts entertained concerning each of them, and that view which admits of fewer doubts should be accepted. Alexander further says that this rule applies to all those opinions of Aristotle in Metaphysics for which he offered no proof. For those that followed Aristotle believed that his opinions are far less subject to doubt than any other opinion. We follow the same rule. Being convinced that the question whether the heavens are eternal or not cannot be decided by proof, neither in the affirmative nor in the negative, we have enumerated the objections raised to either view, and shown how the theory of the Eternity of the Universe is subject to stronger objections, and is more apt to corrupt the notions concerning God [than the other]. Another argument can be drawn from the fact that the theory of the Creation was held by our Father Abraham, and by our Teacher Moses.
Having mentioned the method of testing the two theories by the objections
raised against them, I find it necessary to give some further explanation of the subject.