9 The question might be raised, why some things are produced spontaneously as well as by art, e. g. health, while others are not, e. g. a house. The reason is that in some cases the matter which governs the production in the making and producing of any work of art, (10) and in which a part of the product is present—some matter is such as to be set in motion by itself and some is not of this nature, and of the former kind some can move itself in the particular way required, while other matter is incapable of this; for many things can be set in motion by themselves but not in some particular way, e. g. that of dancing. (15) The things, then, whose matter is of this sort, e. g. stones, cannot be moved in the particular way required,34 except by something else, but in another way they can move themselves—and so it is with fire. Therefore some things will not exist apart from some one who has the art of making them, while others will; for motion will be started by these things which have not the art but can themselves be moved by other things which have not the art or with a motion starting from a part of the product.35 (20)
And it is clear also from what has been said that in a sense every product of art is produced from a thing which shares its name (as natural products are produced), or from a part of itself which shares its name (e. g. the house is produced from a house, qua produced by reason; for the art of building is the form of the house), or from something which contains a part of it—if we exclude things produced by accident; for the cause of the thing’s producing the product directly per se is a part of the product. (25) The heat in the movement36 caused heat in the body, and this is either health, or a part of health, or is followed by a part of health or by health itself. And so it is said to cause, health, because it causes that to which health attaches as a consequence.
Therefore, (30) as in syllogisms, substance37 is the starting-point of everything. It is from ‘what a thing is’ that syllogisms start; and from it also we now find processes of production to start.
Things which are formed by nature are in the same case as these products of art. For the seed is productive in the same way as the things that work by art; for it has the form potentially, and that from which the seed comes has in a sense the same name as the offspring—only in a sense, for we must not expect parent and offspring always to have exactly the same name, as in the production of ‘human being’ from ‘human being’; for a ‘woman’ also can be produced by a ‘man’—unless the offspring be an imperfect form; which is the reason why the parent of a mule is not a mule.38 [1034b] The natural things which (like the artificial objects previously considered39) can be produced spontaneously are those whose matter can be moved even by itself in the way in which the seed usually moves it; those things which have not such matter cannot be produced except from the parent animals themselves. (5)
But not only regarding substance does our argument prove that its form does not come to be, but the argument applies to all the primary classes alike, i. e. quantity, quality, and the other categories. (10) For as the brazen sphere comes to be, but not the sphere nor the brass, and so too in the case of brass itself, if it comes to be, it is its concrete unity that comes to be (for the matter and the form must always exist before), so is it both in the case of substance and in that of quality and quantity and the other categories likewise; for the quality does not come to be, but the wood of that quality, and the quantity does not come to be, but the wood or the animal of that size. (15) But we may learn from these instances a peculiarity of substance, that there must exist beforehand in complete reality another substance which produces it, e. g. an animal if an animal is produced; but it is not necessary that a quality or quantity should pre-exist otherwise than potentially.
10 Since a definition is a formula, and every formula has parts, (20) and as the formula is to the thing, so is the part of the formula to the part of the thing, the question is already being asked whether the formula of the parts must be present in the formula of the whole or not. For in some cases the formulae of the parts are seen to be present, and in some not. The formula of the circle does not include that of the segments, but that of the syllable includes that of the letters; yet the circle is divided into segments as the syllable is into letters. (25)—And further if the parts are prior to the whole, and the acute angle is a part of the right angle and the finger a part of the animal, the acute angle will be prior to the right angle and the finger to the man. (30) But the latter are thought to be prior; for in formula the parts are explained by reference to them, and in respect also of the power of existing apart from each other the wholes are prior to the parts.
Perhaps we should rather say that ‘part’ is used in several senses. One of these is ‘that which measures another thing in respect of quantity’. But let this sense be set aside; let us inquire about the parts of which substance consists. [1035a] If then matter is one thing, form another, the compound of these a third, and both the matter and the form and the compound are substance, even the matter is in a sense called part of a thing, while in a sense it is not, but only the elements of which the formula of the form consists. e. g. of concavity flesh (for this is the matter in which it is produced) is not a part, but of snubness it is a part; and the bronze is a part of the concrete statue, (5) but not of the statue when this is spoken of in the sense of the form. (For the form, or the thing as having form, should be said to be the thing, but the material element by itself must never be said to be so.) And so the formula of the circle does not include that of the segments, but the formula of the syllable includes that of the letters; for the letters are parts of the formula of the form, (10) and not matter, but the segments are parts in the sense of matter on which the form supervenes; yet they are nearer the form than the bronze is when roundness is produced in bronze. But in a sense not even every kind of letter will be present in the formula of the syllable, (15) e. g. particular waxen letters or the letters as movements in the air; for in these also we have already something that is part of the syllable only in the sense that it is its perceptible matter. For even if the line when divided passes away into its halves, or the man into bones and muscles and flesh, it does not follow that they are composed of these as parts of their essence, but rather as matter; and these are parts of the concrete thing, (20) but not also of the form, i. e. of that to which the formula refers; wherefore also they are not present in the formulae. In one kind of formula, then, the formula of such parts will be present, but in another it must not be present, where the formula does not refer to the concrete object. For it is for this reason that some things have as their constituent principles parts into which they pass away, while some have not. Those things which are the form and the matter taken together, (25) e. g. the snub, or the bronze circle, pass away into these materials, and the matter is a part of them; but those things which do not involve matter but are without matter, and whose formulae are formulae of the form only, do not pass away—either not at all or at any rate not in this way. (30) Therefore these materials are principles and parts of the concrete things, while of the form they are neither parts nor principles. And therefore the clay statue is resolved into clay and the ball into bronze and Callias into flesh and bones, and again the circle into its segments; for there is a sense of ‘circle’ in which it involves matter. [1035b] For ‘circle’ is used ambiguously, meaning both the circle, unqualified, and the individual circle, because there is no name peculiar to the individuals.
The truth has indeed now been stated, but still let us state it yet more clearly, taking up the question again. The parts of the formula, (5) into which the formula is divided, are prior to it, either all or some of them. The formula of the right angle, however, does not include the formula of the acute, but the formula of the acute includes that of the right angle; for he who defines the acute uses the right angle; for the acute is ‘less than a right angle’. The circle and the semicircle also are in a like relation; for the semicircle is defined by the circle; and so is the finger by the whole body, (10) for a finger is ‘such and such a part of a man’. Ther
efore the parts which are of the nature of matter, and into which as its matter a thing is divided, are posterior; but those which are of the nature of parts of the formula, and of the substance according to its formula, are prior, either all or some of them. And since the soul of animals (for this is the substance of a living being) is their substance according to the formula, (15) i. e. the form and the essence of a body of a certain kind (at least we shall define each part, if we define it well, not without reference to its function, and this cannot belong to it without perception40), so that the parts of soul are prior, either all or some of them, to the concrete ‘animal’, and so too with each individual animal; and the body and its parts are posterior to this, (20) the essential substance, and it is not the substance but the concrete thing that is divided into these parts as its matter:—this being so, to the concrete thing these are in a sense prior, but in a sense they are not. For they cannot even exist if severed from the whole; for it is not a finger in any and every state that is the finger of a living thing, but a dead finger is a finger only in name. (25) Some parts are neither prior nor posterior to the whole, i. e. those which are dominant and in which the formula, i. e. the essential substance, is immediately present, e. g. perhaps the heart or the brain; for it does not matter in the least which of the two has this quality. But man and horse and terms which are thus applied to individuals, but universally, are not substance but something composed of this particular formula and this particular matter treated as universal; and as regards the individual, (30) Socrates already includes in him ultimate individual matter; and similarly in all other cases. ‘A part’ may be a part either of the form (i. e. of the essence), or of the compound of the form and the matter, or of the matter itself. But only the parts of the form are parts of the formula, and the formula is of the universal; for ‘being a circle’ is the same as the circle, and ‘being a soul’ the same as the soul. [1036a] But when we come to the concrete thing, e. g. this circle, i. e. one of the individual circles, whether perceptible or intelligible (I mean by intelligible circles the mathematical, and by perceptible circles those of bronze and of wood)—of these there is no definition, (5) but they are known by the aid of intuitive thinking or of perception; and when they pass out of this complete realization it is not clear whether they exist or not; but they are always stated and recognized by means of the universal formula. But matter is unknowable in itself. And some matter is perceptible and some intelligible, perceptible matter being for instance bronze and wood and all matter that is changeable, (10) and intelligible matter being that which is present in perceptible things not qua perceptible, i. e. the objects of mathematics.
We have stated, then, how matters stand with regard to whole and part, and their priority and posteriority. But when any one asks whether the right angle and the circle and the animal are prior, (15) or the things into which they are divided and of which they consist, i. e. the parts, we must meet the inquiry by saying that the question cannot be answered simply. For if even bare soul is the animal or41 the living thing, or the soul of each individual is the individual itself, and ‘being a circle’ is the circle, and ‘being a right angle’ and the essence of the right angle is the right angle, then the whole in one sense must be called posterior to the part in one sense, (20) i. e. to the parts included in the formula and to the parts of the individual right angle (for both the material right angle which is made of bronze, and that which is formed by individual lines, are posterior to their parts); while the immaterial right angle is posterior to the parts included in the formula, but prior to those included in the particular instance, and the question must not be answered simply. If, however, the soul is something different and is not identical with the animal, (25) even so some parts must, as we have maintained, be called prior and others must not.
11 Another question is naturally raised, viz. what sort of parts belong to the form and what sort not to the form, but to the concrete thing. Yet if this is not plain it is not possible to define any thing; for definition is of the universal and of the form. (30) If then it is not evident what sort of parts are of the nature of matter and what sort are not, neither will the formula of the thing be evident. In the case of things which are found to occur in specifically different materials, as a circle may exist in bronze or stone or wood, it seems plain that these, the bronze or the stone, are no part of the essence of the circle, since it is found apart from them. (35) Of things which are not seen to exist apart, there is no reason why the same may not be true, just as if all circles that had ever been seen were of bronze; for none the less the bronze would be no part of the form; but it is hard to eliminate it in thought. [1036b] e. g. the form of man is always found in flesh and bones and parts of this kind; are these then also parts of the form and the formula? No, (5) they are matter; but because man is not found also in other matters we are unable to perform the abstraction.
Since this is thought to be possible, but it is not clear when it is the case, some people,42 already raise the question even in the case of the circle and the triangle, thinking that it is not right to define these by reference to lines and to the continuous, (10) but that all these are to the circle or the triangle as flesh and bones are to man, and bronze or stone to the statue; and they reduce all things to numbers, and they say the formula of ‘line’ is that of ‘two’. And of those who assert the Ideas some43 make ‘two’ the line-itself, and others make it the Form of the line; for in some cases they say the Form and that of which it is the Form are the same, (15) e. g. ‘two’ and the Form of two; but in the case of ‘line’ they say this is no longer so.
It follows then that there is one Form for many things whose form is evidently different (a conclusion which confronted the Pythagoreans also); and it is possible to make one thing the Form-itself of all, and to hold that the others are not Forms; but thus all things will be one. (20)
We have pointed out, then, that the question of definitions contains some difficulty, and why this is so. And so to reduce all things thus to Forms and to eliminate the matter is useless labour; for some things surely are a particular form in a particular matter, or particular things in a particular state. And the comparison which Socrates the younger44 used to make in the case of ‘animal’45 is not sound; for it leads away from the truth, (25) and makes one suppose that man can possibly exist without his parts, as the circle can without the bronze. But the case is not similar; for an animal is something perceptible, and it is not possible to define it without reference to movement—nor, therefore, without reference to the parts’ being in a certain state. For it is not a hand in any and every state that is a part of man, (30) but only when it can fulfil its work, and therefore only when it is alive; if it is not alive it is not a part.
Regarding the objects of mathematics, why are the formulae of the parts not parts of the formulae of the wholes; e. g. why are not the semicircles included in the formula of the circle? It cannot be said, ‘because these parts are perceptible things’; for they are not. (35) But perhaps this makes no difference; for even some things which are not perceptible must have matter; indeed there is some matter in everything which is not an essence and a bare form but a ‘this’. [1037a] The semicircles, then, will not be parts of the universal circle, but will be parts of the individual circles, as has been said before46; for while one kind of matter is perceptible, there is another which is intelligible.
It is clear also that the soul is the primary substance and the body is matter, (5) and man or animal is the compound of both taken universally; and ‘Socrates’ or ‘Coriscus’, if even the soul of Socrates may be called Socrates,47 has two meanings (for some mean by such a term the soul, and others mean the concrete thing), but if ‘Socrates’ or ‘Coriscus’ means simply this particular soul and this particular body, the individual is analogous to the universal in its composition.48
Whether there is, (10) apart from the matter of such substances, another kind of matter, and one should look for some substance other than these, e. g. numbers
or something of the sort, must be considered later.49 For it is for the sake of this that we are trying to determine the nature of perceptible substances as well, since in a sense the inquiry about perceptible substances is the work of physics, (15) i. e. of second philosophy; for the physicist must come to know not only about the matter, but also about the substance expressed in the formula, and even more than about the other. And in the case of definitions, how the elements in the formula are parts of the definition, and why the definition is one formula (for clearly the thing is one, (20) but in virtue of what is the thing one, although it has parts?)—this must be considered later.50
What the essence is and in what sense it is independent, has been stated universally in a way which is true of every case,51 and also why the formula of the essence of some things contains the parts of the thing defined, while that of others does not. (25) And we have stated that in the formula of the substance the material parts will not be present (for they are not even parts of the substance in that sense, but of the concrete substance; but of this there is in a sense a formula, and in a sense there is not; for there is no formula of it with its matter, for this is indefinite, but there is a formula of it with reference to its primary substance—e. g. in the case of man the formula of the soul—for the substance is the indwelling form, from which and the matter the so-called concrete substance is derived;52 e. g. concavity is a form of this sort, for from this and the nose arise ‘snub nose’ and ‘snubness’); but in the concrete substance, (30) e. g. a snub nose or Callias, the matter also will be present.53 And we have stated that the essence and the thing itself are in some cases the same; i. e. in the case of primary substances, e. g. curvature and the essence of curvature, if this is primary. [1037b] (By a ‘primary’ substance I mean one which does not imply the presence of something in something else, i. e. in something that underlies it which acts as matter.) But things which are of the nature of matter, or of wholes that include matter, (5) are not the same as their essences, nor are accidental unities like that of ‘Socrates’ and ‘musical’; for these are the same only by accident.54
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