In several of his works, Nietzsche attacks the “grammatical prejudice” or “superstition of logicians” in positing a doer behind the deed. For example:
“‘[T]he doer’ is merely a fiction added to the deed — the deed is everything. The popular mind in fact doubles the deed; when it sees the lightning flash, it is the deed of a deed: it posits the same event first as cause and then a second time as its effect. Scientists do no better when they say ‘force moves’, ‘force causes’, and the like” (Genealogy of Morals, 1st essay, section 13, Kaufman tr., p. 45).
One of the more obvious targets of this polemic would seem to be a certain stereotypical Aristotelianism. Such a view would take Aristotle’s more superficial characterization of “substance” [ousia] as the “underlying thing” as a final truth. As Nietzsche points out, this view has very wide diffusion, and has come to be regarded as common sense.
We have seen in some detail, however, that in his more advanced thought in the Metaphysics, Aristotle explicitly inverts this popular prejudice, and makes act [energeia] the criterion of what is a substance most of all [ousia malista]. As Goethe said, “In the beginning was the deed”.
Contrary to Nietzsche though, this does not make of substance a mere fiction. For Aristotle, substance is ultimately a result rather than a starting point. It turns out to be a derived concept, rather than an elementary one as may first appear. But as a result and as a derived concept, it has legitimate use.
Even the great 20th century Thomist Etienne Gilson suggests in his Being and Some Philosophers that we should think of being as a verb rather than as a noun. I too keep harping on the fact that all the many “senses of being” Aristotle enumerates in book Delta of the Metaphysics are senses of the connective “is”. But this is not the end of the story either.
The next thing we should notice is that what Aristotle principally enumerates and emphasizes in book Delta and elsewhere are the senses of being in which we say something “is” something (else) in accordance with one of the categories. These are transitive (connective) senses of “is”, associable with the formation of propositions that could be evaluated as true or false. Behind Aristotle’s talk about being is a guiding concern with normative saying and intelligible explanation of what properly speaking “is” the case. With his Thomistic roots, Gilson on the other hand emphasizes an intransitive sense of being as “existing”.
In numerous passages in the Metaphysics, Aristotle does indeed use “being” in an intransitive way, but my contention is that this is by way of summary or a kind of shorthand, which should be understood as presupposing and referring back to something like the enumeration of senses of being that we actually find in book Delta, all of which I would contend are transitive.
The only apparent exception in Delta is none other than being in the sense of in-act and in-potentiality. This occurs at the very end of the enumeration, and can reasonably be interpreted as shorthand for the longer expressions used earlier. Moreover, the detailed discussion of being in-act and in-potentiality in book Theta is about something (transitively) being something definite in-act or in-potentiality. In Delta, I think the brief mention of being in-act and in-potentiality is to be understood as wrapping a modal dimension around the more basic saying of “is” in the senses of the Categories. (Here I have passed over other senses of being that Aristotle himself says are less important, but none of these corresponds to what the scholastics and the moderns call existence either.)
Perhaps Gilson is right that Aquinas can be read as a sort of “existentialist”. But relatively speaking, I think Aristotle himself is closer to the analytic and continental philosophers who have emphasized the importance of language, meaning, and discourse. (See also Being as Such?.)