This may suffice to convince the student that the essential formality of substance as such is _the negation of actual support_. And now let us inquire what is the formal constituent of suppositum. Suppositum and substance, though not identical, are similarly constituted. The positive entity of both is the same, and the difference between them arises entirely from the different character of their negative formality, as we are going to explain. For the essence or nature of every created being is naturally accompanied by two negations, of which neither is essential to it, while either of them, absolutely speaking, can be made to disappear. The first is the negation of anything _underlying_ as a supporter and acting the part of a subject; and it is to this negation, as we have proved, that any complete nature formally owes its name and rank of substance. The second is the negation of anything _overlying_, so to say, and possessing itself of the created being in such a manner as to endue it with an additional complement and a new subsistence; and it is to this negation that a complete nature formally owes its name and rank of suppositum. The complete nature, or the thing in question, when considered apart from these two negations, does not, therefore, convey the idea either of substance or of suppositum, but exhibits a mere potency of being either or both; as it is evident that there cannot be a substance without the formal constituent of substance, nor a suppositum without the formal constituent of suppositum.