I don't necessarily disagree with that. There is however, IMO, a quite good argument against "substances" that is advanced by process metaphysicians on this front:
To be a substance (thing-unit) is to function as a thing-unit in various situations. And to have a property is to exhibit this property in various contexts. ('The only fully independent substances are those which-like people-self-consciously take themselves to be units.)
As far as process philosophy is concerned, things can be conceptualized as clusters of actual and potential processes. With Kant, the process philosopher wants to identify what a thing is with what it does (or, at any rate, can do). After all, even on the basis of an ontology of substance and property, processes are epistemologically fundamental. Without them, a thing is inert, undetectable, disconnected from the world's causal commerce, and inherently unknowable. Our only epistemic access to the absolute properties of things is through inferential triangulation from their modus operandi-from the processes through which these manifest themselves. In sum, processes without substantial entities are perfectly feasible in the conceptual order of things, but substances without processes are effectively inconceivable.
Things as traditionally conceived can no more dispense with dispositions than they can dispense with properties. Accordingly, a substance ontologist cannot get by without processes. If his things are totally inert - if they do nothing - they are pointless. Without processes there is no access to dispositions, and without dispositional properties, substance lie outside our cognitive reach. One can only observe what things do, via their discernible effects; what they are, over and above this, is something that always involves the element of conjectural imputation. And here process ontology takes a straight-forward line: In its sight, things simply are what they do rather, what they dispositionally can do and normally would do.
The fact is that all we can ever detect about "things" relates to how they act upon and interact with one another - a substance has no discernible, and thus no justifiably attributable, properties save those that represent responses elicited from it in interaction with others. And so a substance metaphysics of the traditional sort paints itself into the embarrassing comer of having to treat substances ·as bare (propertyless) particulars [substratum] because there is no nonspeculative way to say what concrete properties a substance ever has in and of itself. But a process metaphysics is spared this embarrassment because processes are, by their very nature, interrelated and interactive. A process-unlike a substance -can simply be what it does. And the idea of process enters into our experience directly and as such.
Nicholas Rescher - "Process Metaphysics: An Introduction to Process Philosophy
The general point here being that processes seem to be more necessary than substance. But, against this we might consider one of the great weaknesses of many forms of process metaphysics, that they make all substances (things) essentially arbitrary and just end up positing a single, universal, wholly global process. That is, they collapse the distinction between substance and accidents. This turns out to just be the old Problem of the One and the Many, with the process answer being a sort of hybrid of Parmenides and Heraclitus, siding with Parmenides on the one hand vis-á-vis the unity of being (there being just one thing, the global process), but with Heraclitus on all being flux.
Against this, we can consider that activities and properties seem to have to be predicated of some substance. One does not have a "fast motion" with nothing moving, or nothing in particular moving. A dog can be brown, or light, but we don't have "just browness" with nothing in particular being brown. So we might suppose that some properties, even if they are processes, are parasitic on a different sort of process. Substances themselves are changeable (generation and corruption), yet there is something that stays the same between different instantiations of the same substantial form.
Second, there is an ostentatious plurality within being in that we are each individual persons; we experience our own thoughts and sensations and not other people's. Hence, there seems to be real multiplicity, and real unity as respects individual minds/persons. Essences are primarily concerned with the metaphysical principle by which things are the intelligible unities that they are. Thus, they are there to explain how there are specific properties in the first place. That is, they are primarily an explanatory metaphysical principle, rather than serving primarily to explain how words refer to different types of things. So, not our ability to pick out and refer to ants, but rather the fact that ants exist as a particular sort of thing and represent relatively self-determining and self-moving wholes.
Unity here occurs on a sliding scale, since unity and multiplicity are contrary, as opposed to contradictory opposites. Hence, the desire to pick out the exact limits of ants, people, trees, etc. in terms of superveniance is misguided. Physical substances are constantly changing. Their essence is the principle that explains how they are what they are.
Another difficulty with ignoring substances would be the fact that most of a thing's apparent properties only show up in particular contexts. Salt is "water soluble," but only ever demonstrates this property when placed in water (i.e., an interaction). Hence, the idea of potencies and powers.
Anyhow, an essence helps explain a thing's affinity to act one way and not any other. In terms of organism's, which most properly possess essences (i.e., are substantial unities rather than bundles of external causes) the essence helps explain the end/final causality related to the organic whole, and how an organism's parts are related to it as a whole (the idea in biology or "function.")
The problem with making essences into static sets of properties is that it:
A. Neglects how physical things are always changing (hence physus); and
B. Only really gets at the epistemic and linguistic movements of picking out types of things, not the actuality that must underlie their having their observed properties.
The article from
@Banno is a sort of classical misunderstanding of universals/essences. It opens by pointing out that under realism they play some sort of a metaphysical role, and then presents an argument that presupposes that what is at stake is the use of categorical terms. If categorical terms could be otherwise, then there are not essences. If categorical terms are socially determined, then there cannot be essences (presumably because essences are just lookup lists of properties that link a word/concept to some things).
This misses the point entirely. Realists have generally not denied that terms are based on human ends and they don't deny that they are historically influenced. They don't deny that we can make up more or less arbitrary terms by dividing and concatenating intelligible wholes. Nor do they maintain that universals must exist for every common term. The rebuttal to the idea of essences is that there are not truly such things as tigers or trees, but rather that man finds it useful to name them such, and that this is what makes them so.
But the immediate question here would be "what caused this convention to be useful?" The most obvious answer is that there are such things as cats, flowers, etc. and that they are not ontologically dependent on language or man's will to exist as such. Nominalism seems to either end up acknowledging a prior actuality that is the cause of "names" (essence) or else (more commonly in recent thought) defaults into a sort of extreme volanturism where "usefulness" or "will" becomes an unanalyzable metaphysical primitive that chooses what everything is (i.e., John Calvin individualized or democratized; "In the beginning the Language Community created the heaven and the earth. The earth was without form, and void; and darkness was upon the face of the soup of usefulness. And the Spirit of the Language Community moved upon the face of the waters. And the Language Community said, Let this be light: and thus it was light.")
Whereas the reductionist realist wants to say that essences can be reduced to properties because more basic actualities can explain more complex beings. The difficulty is showing that this is so. Exactly which set of actualities corresponds to catness and the organic unity of cats, or which component actualities combine to form man and his ends? Of course, there are higher, more general principles, but if these are analogously realized they are not subject to any univocal reductionism.
I don't know if I'd put it quite like that, although that is how commonly how it is put. Mystical author's like Saint John of the Cross or Saint Bernard of Clairvaux are extremely popular and influential in Catholicism. I would say rather that there are different stresses. The Orthodox put less focus on systematic theology, and so this makes mysticism more central to theological discourses. They also put a greater focus on asceticism in general. Just about half the days of the year are fast days, and recommended fasts tend to be more austere. I might say they are more praxis focused, at least in the Anglophone context, but even this seems hard to justify completely. They do make a very different distinction between the active and contemplative life. For Catholics, the active life is mostly service and evangelism, while the contemplative life is all forms of prayer, psalmody, the Hours, fasts, etc. For the Orthodox, all that latter stuff is also the "active life" and the contemplative life is strictly noetic prayer.
They are definitely different, but it's hard to say just how. The Rosary is in some ways similar to the Jesus Prayer/prayer rope. The Orthodox hours are more "noetic" in a way (they call out the nous in particular). I cannot think of a better word. They also seem somehow more inwardly, and thus individually focused in a way that I cannot quite put my finger on, even though they are also performed corporately. The biggest distinction is that they are vastly longer, too long really to be practical for the laity unless they are only keeping Matins and Vespers or Compline, whereas Catholic laity keeping the full Hours seems much more common. Their Lenten compline is legit an hour and a half long lol.