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So far, so good. But concrete reality is one thing, reality, something else. Likewise, "the ultimate or completely general theory of concrete entities as such (from which all abstract entities in some fashion derive)" is one thing, "a theory of reality itself (or as such)," somethk-tg something else.

Metaphysics in the strict sense is the study of the necessary aspects of reality, and of nothing else. As such, it does only two things: it describes the necessary aspect of the one and only necessary reality, including the requirement that this reality have some nonnecessary aspects or other; and it describes what all nonnecessary or contingent realities have in common (for these common features themselves are necessary) and what distinguishes them ontologically from the one necessary reality, even in its nonnecessary or contingent aspects. 

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"\[T\]he theory of concreteness is not the bare theory of being _\[Sc. qua_ being\], of what an 'entity' is just' as an entity. Rather it is primarily the theory of what a concrete entity is, as concrete rather than abstract.... \[A\] purely general theory of concreteness will include a theory of abstractness, but there will be a real distinction between the two."

"The concrete is the inclusive form of reality, from which the abstract is an abstracted aspect or constituient.... \[T\]he concrete is the definite, for to abstract from details or aspects is, in so far, to conceive the indefinite." 

U"\[S\]trictly speaking there is but one metaphysical, innate or strictly universal and necessary idea or principle, _concreteness_ (containing internally its own contrast to abstractness)." 

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