Re: "Thomas Nagel has some really good descriptions of the ways in which reality seems to have fundamentally teleological aspects. For me, this hinges on the idea of instrumentality. /
Instrumentality is the translation of an abstract into a concrete idea, I think."
Telos seems to have more to do with the idea itself than the concrete result. For example, from the
Internet Encyclopedia of Philosophy:
"Consider a knife. If you wanted to describe a knife, you would talk about its size, and its shape, and what it is made out of, among other things. But Aristotle believes that you would also, as part of your description, have to say that it is made to cut things. And when you did, you would be describing its
telos."
Heidegger goes into more depth in
On The Essence and Concept of ΦΥΣΙΣ in Aristotle's Physics, p. 26 & 27:
"In Greek thought ένεργεία [energeia] means "standing in the work," where "work" means that which stands fully in its "end." But in turn the "fully-ended or fulfilled" [
das "Vollendete" ] does not mean "the concluded," any more than τέλος [telos] means "conclusion." Rather, in Greek thought τέλος and έργον [ergon] are defined by εΐδος [eidos: form, essence]; they name the manner and mode in which something stands "finally and finitely" [
"endlich" ] in its appearance. ...
"Aristotle says this in his own way in a sentence we take from the treatise that deals explicitly with έντελέχεια [entelecheia] (
Meta. , Θ 8, 1049 b 5): φανερόν ότι πρότερον ένέργεια δυνάμεώς έστιν [phanerón oti proteron energeia dynameis estis]: "Manifestly standing-in-the-work is prior to appropriateness for...." In this sentence Aristotle’s thinking and
pari passu Greek thinking, reaches its peak. But if we translate it in the usual way, it reads: "Clearly actuality is prior to potentiality." Ενέργεια [energeia], standing-in-the-work in the sense of presencing into the appearance, was translated by the Romans as
actus, and so with one blow the Greek world was toppled. From
actus,
agere (to effect) came
actualitas, "actuality." Δύναμις [dynamis] became
potentia, the ability and potential that something has. Thus the assertion, "Clearly actuality is prior to potentiality" seems to be evidently in error, for the contrary is more plausible. Surely in order for something to be "actual" and to be able to be "actual," it must first be possible. Thus, potentiality is prior to actuality. But if we reason this way, we are not thinking either with Aristotle or with the Greeks in general. Certainly δύναμις [dynamis] also means "ability" and it can be used as the word for "power," but when Aristotle employs δύναμις as the opposite concept to έντελέχεια [entelecheia] and ένεργεία [energeia], he uses the word (as he did analogously with κατηγορία [katēgoria: predication, categorisation] and ούσία [ousia]) as a thoughtful name for an essential basic concept in which beingness, ούσία, is thought."
So telos is to do with the 'standing' of the essence, the instrumental idea, but not so much the actualised concretion. In general we can take a break from the instrumental reification of reality, as Derrida notes of 'teleology' in
A Taste for the Secret, p. 20:
"It is perhaps necessary to free the value of the future from the value of the [eschatological, teleological] 'horizon' that traditionally has been attached to it — a horizon being, as the Greek word indicates, a limit from which I pre-comprehend the future. I wait for it, I predetermine it, and thus I annul it. Teleology is, at bottom, the negation of the future, a way of knowing beforehand the form that will have to be taken by what is still to come."
So we can actually chill-out and float upstream in a reality free of instrumentality, from time to time.