DIFFERENCES WHICH COMPLETE THE BEING MUST BE PREFIXED TO THAT TO WHICH THEY REFER.
In general, the differences which complete a being should be classified along with that of which they are the differences, especially when a difference belongs to a single subject. If a difference complete the being of a subject, and do not complete the being of another, this difference should be classified along with the subject whose being it completes, leaving that whose being it does not complete for separate consideration. By this we do not mean completing the Being in general, but completing some particular being, so that the subject spoken of as a particular one admits no further essential addition. We therefore have the right to say that triangles, or that quadrilaterals, as well as surfaces and solids, are equal, and to predicate equality or inequality of quantitative entities. But we yet have to study whether quality only can be said to be similar or dissimilar.[395]