(10) All science is incorporeal, the instrument it uses being the mind, just as the mind employs the body. Both then come into bodies, [I mean] both things that are cognizable by mond alone and things material. For all things must consist out of antithesis and contrariety; and this can otherwise not be. Tat: Who then is this material God of whom thou speakest? Hermes: Cosmos is beautiful, but is not good - for that it is material and freely passible; and though it is the first of all things passible, yet is it in the second rank of being and wanting in itself. And though it never hath itself its birth in time, but ever is, yet is its being in becoming, becoming for all time the genesis of qualities and quantities; for it is mobile and all material motion's genesis.

(2) The names are reduced by grammar into the twenty-four general elements; for the elements must be determined. For of Particulars there is no scientific knowledge, seeing they are infinite. But it is the property of science to rest on general and defined principles. Whence also Particulars are resolved into Universals. And philosophic research is occupied with Conceptions and Real subjects. But since of these the Particulars are infinite, some elements have been found, under which every subject of investigation is brought; and if it be shown to enter into any one or more of the elements, we prove it to exist; but if it escape them all, that it does not exist.

(4) Now, Induction aims at generalization and definition; and the divisions are the species, and what a thing is, and the individual. The contemplation of the How adduces the assumption of what is peculiar; and doubts bring the particular differences and the demonstrations, and otherwise augment the speculation and its consequences; and the result of the whole is scientific knowledge and truth.

(1) By common agreement of all that have arrived at the conception of such a Kind, what is known as Matter is understood to be a certain base, a recipient of Form-Ideas. Thus far all go the same way. But departure begins with the attempt to establish what this basic Kind is in itself, and how it is a recipient and of what.

To a certain school, body-forms exclusively are the Real Beings; existence is limited to bodies; there is one only Matter, the stuff underlying the primal-constituents of the Universe: existence is nothing but this Matter: everything is some modification of this; the elements of the Universe are simply this Matter in a certain condition.

The school has even the audacity to foist Matter upon the divine beings so that, finally, God himself becomes a mode of Matter- and this though they make it corporeal, describing it as a body void of quality, but a magnitude.

Another school makes it incorporeal: among these, not all hold the theory of one only Matter; some of them while they maintain the one Matter, in which the first school believes, the foundation of bodily forms, admit another, a prior, existing in the divine-sphere, the base of the Ideas there and of the unembodied Beings.

(3) Should one say that Knowledge is founded on demonstration by a process of reasoning, let him hear that first principles are incapable of demonstration; for they are known neither by art nor sagacity. For the latter is conversant about objects that are susceptible of change, while the former is practical solely, and not theoretical. Hence it is thought that the first cause of the universe can be apprehended by faith alone. For all knowledge is capable of being taught; and what is capable of being taught is rounded on what is known before. But the first cause of the universe was not previously known to the Greeks; neither, accordingly, to Thales, who came to the conclusion that water was the first i cause; nor to the other natural philosophers who succeeded him, since it was Anaxagoras who was the first who assigned to Mind the supremacy over material things. But not even he preserved the dignity suited to the efficient cause, describing as he did certain silly vortices, together with the inertia and even foolishness of Mind. Wherefore also the Word says, "Call no man master on earth." For knowledge is a state of mind that results from demonstration; but faith is a grace which from what is indemonstrable conducts to what is universal and simple, what is neither with matter, nor matter, nor under matter. But those who believe not, as to be expected, drag all down from heaven, and the region of the invisible, to earth, "absolutely grasping with their hands rocks and oaks," according to Plato. For, clinging to all such things, they asseverate that that alone exists which can be touched and handled, defining body and essence to be identical: disputing against themselves, they very piously defend the existence of certain intellectual and bodiless forms descending somewhere from above from the invisible world, vehemently maintaining that there is a true essence. "Lo, I make new things," saith the Word, "which eye hath not seen, nor ear heard, nor hath it entered into the heart of man."

(2) Such, then, is the method of the discovery [of truth]. For we must begin with the knowledge of the questions to be discussed. For often the form of the expression deceives and confuses and disturbs the mind, so that it is not easy to discover to what class the thing is to be referred; as, for example, whether the foetus be an animal. For, having a conception of an animal and a foetus, we inquire if it be the case that the foetus is an animal; that is, if the substance which is in the foetal state possesses the power of motion, and of sensation besides. So that the inquiry is regarding functions and sensations in a substance previously known. Consequently the man who proposes the question is to be first asked, what he calls an animal. Especially is this to be done whenever we find the same term applied to various purposes; and we must examine whether what is signified by the term is disputed, or admitted by all. For were one to say that he calls whatever grows and is fed an animal, we shall have again to ask further, whether he considered plants to be animals; and then, after declaring himself to this effect, he must show what it is which is in the foetal state, and is nourished.