hence their name.
either predicated of them, or being in them, are for this reason, especially, termed substances. Yet the same relation as the primary substances bear to all other things, does species bear to genus, for species is subjected to genus since genera are predicated of species, 7. Genus a predicate of species, but not vice versâ. but species are not reciprocally predicated of genera, whence the species is rather substance than the genus.
9. Infimæ species are equal in their not being substance. Of species themselves, however, as many as are not genera, are not more substance, one than another, for he will not give a more appropriate definition of "a certain man," who introduces "man," than he who introduces "horse," into the definition of "a certain horse:" in like manner of primary substances, one is not more substance than another, for "a certain man" is not more substance than a "certain ox." With reason therefore, after the first substances, of the rest, 10. Species and genera alone are secondary substances. species and genera alone are termed secondary substances, since they alone declare the primary substances of the predicates; thus, if any one were to define what "a certain man" is, he would, by giving the species or the genus, define it appropriately, and will do so more clearly by introducing "man" than "animal;" but whatever else he may introduce, he will be introducing, in a manner, foreign to the purpose, as if he were to introduce "white," or "runs," or any thing else of the kind, so that with propriety of the others, these alone are termed substances. 11. Equality of relation between cognate genera and species. Moreover, the primary substances, because they are subject to all the rest, and all the others are predicated of, or exist in, these, are most properly termed substances, but the same relation which the primary substances bear to all other things, do the species and genera of the first substances bear to all the rest, since of these, are all the rest predicated, for you will say that "a certain man" is "a grammarian," and therefore you will call both "man" and "animal" "a grammarian," and in like manner of the rest.[1]
- ↑ Archytas adopts a different division of substance, into matter, form, and a composite of the two, and this division Aristotle shows in his Physics, and Metaphysics, and Physical Auscultation he knew, but does not employ it in this treatise, as not adopted for its subject matter, namely, logical discussion. Cf. Physica Ausc. lib. iii., and Metaph. lib. vi. and xi.
