Tag: Astronomy

Eternal Sensibles

Metaphysics Lambda chapter 8 returns to a consideration of astronomical entities as eternal sensible substances. While this “appears to be an insertion of physics (or of astronomy) into the metaphysical discourse” (Dieu san la puissance, 2nd ed., ch. 5, p. 194, my translation throughout), Aubry sees it as fulfilling part of the program laid out in Lambda 1 for a unified account of the principles of all substance.

“Thoroughly interrogating [the principle’s] relation to the other substances allows the efficacity of the act without power to be shown” (p. 195).

Modern people are not generally used to thinking of the causality of a substance in relation to another substance. We are taught to approach causality in terms of events leading to other events, or to states of affairs. Aristotle on the other hand is less concerned with explaining particular events or states of affairs than with the much more general and multifarious question of why things are the way they are. He argues that “substance” (ousia) and final causality play the pivotal role in any account of the way things are.

Aristotelian substance is far from being simply the “kingdom of nouns”. For Aristotle no more than for Kant is the what-it-is of things a simple primitive that is just given to us. The “identities” of things are consequences of an involved process, and not a starting point. A substance is explained by its characteristic act, which can be further explained as aiming at a kind of entelechy. These can only be discovered by indirect means, through thoughtful interpretation.

“First, it is a matter of establishing against the Platonists that the principle is a cause, that it has efficacy, and in particular is able to explain the movements of the different substances, of which the theory of Ideas had failed to give an account…. Secondly, it is a matter of identifying the causality proper to the Good, while showing that the Good acts, not insofar as it has a dunamis, as suggested by the formula of Republic book VI, but insofar as it is energeia…. Finally, and this time against the Platonic episodism, it is a matter of marking not only that the Good is efficacious insofar as it has no power, but also that the separate substance is not disjoint from the other substances, though it has a primacy over them: or better, separation if it is conceived as being that of act and no longer that of form, determines the ordering, the very taxis of the ensemble of mobile substances” (ibid).

I am fascinated by this suggestion that the separate first substance is “not disjoint from the other substances”, and that “separation” is also a connecting link. Aristotle wants to emphasize the extent to which the astronomical substances are connected to the first cause by the nature of their ordering. Lambda 10 will extend this to earthly substances.

(We have seen the enumerated criticisms of Platonism before. While agreeing that Aristotle’s formulations in these areas represent a major advance, I also continue to find great value in many of Plato’s other insights.)

“It falls to Lambda 8 to show, against the Platonists, that if we conceive the principles and the separate substances as acts and not as Forms, we can give a complete and precise account of movement: not only that of the sphere of the fixed stars, but also those of the other spheres and planets” (p. 196).

The connection between astronomy and first philosophy that Aristotle works so hard to establish strikes me as poetically beautiful, but I don’t know what to do with it philosophically, except in the very broad sense that astronomical phenomena do affect earthly things, and represent a more inclusive cosmic whole of which our earth is but a part. I am personally inclined to de-emphasize this aspect in favor of his other characterizations of the first cause as the good, and as thought thinking itself. But on the other hand, his idea that the first cause moves other things as a final cause but not as a direct agent seems extraordinarily well argued, and incredibly fruitful and auspicious.

“But now is posed the problem of the relation between the unmoved prime mover and the others. These are ordered according to a hierarchy (taxis) , which follows that of the celestial movements. It appears nonetheless that this hierarchy is also ontological: unlike the first among them, which Lambda 7 had ended by identifying with god, the other unmoved movers are neither characterized in Lambda 8 as pure energeia, nor as identical with the first intelligible and with the best. Of them, it is said that they are immutable and eternal, but also impassible, and that ‘they have on their own attained the supreme good’…. This is insofar as they are ends, telos. Thus, unlike the prime mover, the others are not ends insofar as they are already themselves the good, but insofar as they have attained the good” (ibid, emphasis in original).

“But since it is said of them that they have attained the good, we can suppose that they have been in movement, and indeed that they have been in-potentiality: if the prime mover is always already an act without power, we can suppose that they are powers fully actualized and stabilized in their end” (p. 197).

This is an ingenious solution, within the context of Aristotle’s desire to link astronomy to first philosophy.

Next in this series: The Ideal

Reflections on Book Lambda

It turns out that Aristotle’s way of arguing for a first cause in book Lambda of the Metaphysics depends almost entirely on his unusual thesis of the priority of actuality or being-at-work or fulfillment over potentiality. His justification of the priority of actuality there also seems unexpectedly Kant-like, which means that so does his argument for a first cause.

We don’t positively know that actuality is prior, or that there is a first cause. Rather, Aristotle makes the indirect argument that a priority of actuality is a necessary condition for the kind of intelligibility that we need to have in order to be able to explain things at all. The pure actuality he attributes to the first cause is part of his affirmation that the priority of actuality is not an optional feature of his account.

I have been very impressed by Robert Pippin’s account of how Hegel’s rediscovery of the Aristotelian priority of actuality affects ethics and the theory of agency. Gwenaëlle Aubry increased my sensitivity to the normative, end-like character of Aristotelian actuality itself, and to his repeated associations of the first cause with the good and the beautiful. I’ve always read Aristotle’s first cause in terms of that-for-the-sake-of-which — as a sort of ultimate end — so this was a welcome perspective. This much seems to tightly cohere, and all to be nicely confirmed by the somewhat more disciplined reading of the Metaphysics I’ve just finished.

But I’ve been neglecting another strand from the Physics, which defines motion in terms of actuality and potentiality, and which ultimately traces every motion to the realization of an end, and to the actualization of a potential. Given my own interest in the idea of interpretation in an ethical spirit as first philosophy, this suggestion that material motion as such is in some minimal way ends-governed — even when no living plant or animal is involved — is something I find very appealing, albeit in need of clarification.

On the other hand, the arguments about a first motion and a first moved thing associated with the sphere of the fixed stars presuppose the non-relative status of a geocentric point of view in astronomy, and I don’t see any way to sustain that. The first cause of all things can no longer be conceived as having a special, more direct relation to the motion of the stars as viewed from earth, such as Aristotle suggests.

But we can still say that the pursuit and partial realization of the good and the beautiful are in a way involved in motions in general. This can be defined in a way that depends only on observable patterns of how various kinds of material things tend to seek completion in one way rather than another in different situations.

The good and the beautiful will be a “prime mover” only in this more diffuse sense, not as also having a special relation to the motion of the fixed stars. But we can still have entelechy from top to bottom, and we can still be moved by the beauty of the stars.

Next in this series: More on the First Cause