Substantial Form?

One of the things I have learned recently is that the common scholastic (but post-Aristotelian) notion of substantial form goes back at least to Averroes. Aristotle talks separately about form and about substance, but never combines them in a single phrase like “substantial form”.

One of the important meanings of “substance” (ousia) is indeed form-like, as when he speaks of the what-it-is of things. Aristotle presents this meaning as superseding its more syntactic meaning of “underlying thing”. But eventually, this too is superseded by the uniquely Aristotelian notion of “act” (energeia), about which I have written much in the past year.

I’m now curious whether something like “substantial form” makes any appearance in the neoplatonic commentators like Simplicius and Philoponus. As Platonists, they would have an interest in turning the interpretation of substance back in the direction of form. (See also Substance, Essence, Form).

Flasch on Eckhart

“What is essential is the ability of the soul to give itself a form, to shape itself. It does not stand there fixed, like a tree; it knowingly and willingly throws itself upon others, it becomes what it takes up” (Flasch, Meister Eckhart, pp. 35-36; see Eckhart as Philosopher: Background for introduction).

“The eye, opened and cast on the wood, is, within itself, over there with the wood” (p. 44).

With this example taken from visual perception, Eckhart illustrates the essence of the Aristotelian theories of perception and intellect that, according to Flasch, are at the core of Eckhart’s thought. At the heart of both perception and intellectual knowing, Aristotle posits a kind of fusion of what modern people call subject and object.

Also central to Eckhart’s thought is the neoplatonizing medieval notion of “intellectual soul”, which fuses together the separate Aristotelian notions of intellect and soul, emphasizing their status as an operational whole. For the many medieval writers who attribute such a strong unity to the operational whole of soul and intellect, all the unique attributes of Aristotelian intellect may then also be said of the human soul, though it is far from clear that Aristotle himself would agree with this.

Eckhart also upholds a unitary interpretation of the “substantial form” of hylomorphic unities, which aims to be a completely univocal kind of form. Elsewhere, Flasch notes that this late and specialized version of the more general (and not entirely univocal) notion of form in Aristotle is already present in Averroes’ Long Commentary on the Metaphysics. Albert the Great and Thomas Aquinas used it to argue against the sharp soul-body dualism defended by some medieval Augustinians. Substantial form poses a stronger unity in the forms of things than I want to claim for a reading of Aristotle, but that seems to be a relatively separate issue that does not greatly affect Eckhart’s argument here.

“[L]ike the seeing eye that casts a glance at the wood and becomes one with the wood, man, through active performance, through seeing and loving, becomes that which he sees and loves in the mind…. We retroactively separate eye and wood from the eye-wood unity. Is the wood-eye union the truer reality? Or is it merely an image, or simply a thought? Seeing things clearly in this regard, according to Eckhart, is the necessary precondition for understanding everything he says — not study of the Bible or dogmatic theology. First and foremost, we need to occupy ourselves with understanding this unity. It is our daily life. It is not a thing of nature, but rather the having of natural things” (p. 38).

We become that which we contemplate and love, that toward which we direct our attention. For Eckhart, the intellectual soul is not just a theoretical construct, but a part of everyday experience and of the basic ways of human being. Where the modern “subject” is usually considered to stand aloof from its objects, Aristotelian soul and intellect actively find or develop their content in and by means of what modern people would call their objects. Though we may marvel at it, this kind of fusion is not a mystical ecstasy, but part of the normal working of everyday life. It is not passivity, but a kind of fused activity. It seems to be this fusion at the heart of human experience that for Eckhart involves the divine giving birth to itself.

Eckhart uses philosophical senses of logos (word, speech, discourse, relation, ratio; what distinguishes the human from other animals) to explain its religious sense associated with Incarnation. We might say he uses logos as a name and descriptor for the intellectual soul’s fused active relationality.

“Why is ‘Word’ the keyword? It signifies relation. The Word unifies the speaker and the spoken content” (p. 36).

“‘Word’ in its essence refers to the intellect; the one who speaks and that which is spoken occur in the Word. The Word has a relational character; it unifies within itself those that are separate as natural things…. Eckhart conceives of man as Word, not primarily as a thing of nature” (p. 37).

It seems that for Eckhart, the Biblical Word and the Incarnation refer to the fused activity of the intellectual soul.

“[R]eason conceives of itself as an image identical to its exemplar, which is within it in eidetic fashion, that is, as actual intellectual being, uncreated and uncreatable” (p. 43).

As in Plotinus, for Eckhart the intellectual soul has a direct link with the divine, and may be said to contain metaphysical realities within itself.

“The unity of reflective self-consciousness and ethical orientation follows from this. The way reason — always in the qualified sense — is, it has nothing in common with anything else” (ibid).

“Eckhart does not say: ‘Until now, you have misunderstood Christianity.’ He says: ‘You have misunderstood yourselves, and as long as you persist in this error, you cannot provide Christianity with the intellectual and ethical form which is possible today, in 1300′” (p. 44).

Eckhart makes the astonishing claim that Aristotle, the Old Testament, and the New Testament all teach the same thing. According to Flasch, he even says that the Bible contains all natural philosophy. A first clue to what such sayings mean is that he says he will explain the Bible using nothing but the natural reasons of the philosophers. He will not appeal to revelation to justify what he says. This is not entirely atypical among medieval theologians. Flasch notes that even Anselm of Canterbury, a rather cautious thinker who precedes the main development of Latin scholastic philosophy, considered it a theological best practice to minimize the use of conversation-ending appeals to revelation.

“What previous readings of Eckhart often lack are linguistic discipline, semantic specification, and a philological basis: the way we have labeled and interpreted Eckhart and the categories into which we attempt to squeeze him even today were created at a time when his Latin works were still unknown. And yet they far outnumber his German works, and their tradition is more secure” (p. 46).

Flasch highlights Eckhart’s systematic use of the qualifier “insofar as”, an Aristotelian device that picks out and distinguishes one sense of something that may be considered in several ways. This he combines with a radical notion of what he calls primary determinations. These include the traditional four “transcendentals” Being, Oneness, Truth, and Goodness, as well as Idea, Wisdom, Love, and Justice. In a rather Platonic way, Eckhart will say things like “Insofar as we are just, Justice itself operates through us.”

“If something is, the primary determination is completely present within it. Then not only is the primary determination’s product or its similarity within us; the primary determination itself is present…. Everything that the primary determination itself effects, it effects not toward the outside, but rather into itself. Being has no outside. Again, those imaginative ideas taken from the working methods of craftsmen are problematic. The effecting of the primary determinations is not a producing…. Their effecting consists of making what has been established resemble them, of making what has been established into a being. Eckhart teaches elementary concepts of reciprocity…. Someone who has not learned from the prologues that the active pulls the passive toward itself, that is, that it makes it active, cannot interpret Eckhart’s birth cycle in the proper Eckhartian sense” (p. 80).

“Being, Oneness, and Goodness are active primary determinations, not abstractions. Thus, one has to say that this is God. As Aristotle saw the being of green in the being of the tree, so Eckhart sees the being of things in Being itself” (p. 82).

“I must not speak of Being or of ens in general in the same way that I can speak of this or that individual being…. In substance, they are in each other. This is what pious people mean when they say the world is created. This needs to be explained. Otherwise, the imagining thinking, that is, thinking that creates mental images, edges forward and makes us believe that the creation of the world consisted of God externalizing things from within himself” (pp. 82-83).

“In Eckhart’s time, the concept of pantheism… did not exist. Eckhart removed the issue… by differentiating… between primary determination and individual thing, but he made it clear that Being was not distinguished in the way that individual things were differentiated” (p. 83).

“This theology is short and clear. And it argues philosophically. It easily solves all or almost all questions that can be asked about God, and it does so in the light of natural reason…. There is nothing here of the abyss, nothing of the blinding darkness of Dionysius…. Moses says that God created the world in six days, but he said this for simple people; we know that Being is directly present in self-positing. People say that God created the world, but we know that Being continually posits itself anew in the present” (ibid).

“Placing his Biblical interpretation… before the doctrine of primary determinations — that means contradicting Eckhart” (p. 85).

“[T]ruth, Eckhart says, belongs to the intellect; it indicates relation or includes it within itself. Then follows a strange sentence […]: ‘A relation, however, has its entire being from the soul and as such is a real category, just as time, although it has all its being from the soul, is nonetheless a subspecies of quantity, that is, of a real category'” (p. 89).

“This sentence is strange for several reasons. It shifts from the statement ‘I am the Truth’ to a general theory of relations. Truth, Eckhart says, either is a relation or includes a relation, but a relation stems entirely from the soul and as such is an actual ‘predicament’. Every philosopher admitted that there existed relations purely of thought…. But no one who argued for real relations claimed that they were entirely derived from the soul” (ibid).

This is in Eckhart’s Parisian Questions. Here he rejects the argument of Aquinas that being comes before life and knowing, saying, “I, however, believe the exact opposite” (quoted, p. 91). Eckhart indeed explicitly puts knowing before being.

“[H]e reminds us in good Aristotelian fashion that mathematical objects cannot be considered according to intent or good, and that something that has being is identical [sic] to the good. Good and evil exist in the things themselves, but true and false only in the soul” (p. 91).

“Eckhart successfully describes the special status of the image. It still has, so to speak, a foot in the world of natural things; it consists of wood or stone or canvas; it has an efficient cause and often also an aim. But as an image, it does not have being; rather, it is the relation to the thing it represents…. Insofar as it is knowledge, it belongs to a different world. In questions such as this one, philosophical analysis has to be detached from the imagination” (p. 92).

“Properties are not beings; only their substance has being” (ibid).

“The intellect must not be a specific physical nature if it is to be able to comprehend all physical natures. The knower is the living negation of the known” (p. 93).

Eckhart makes the implicit “negativity” of Aristotelian intellect explicit, and applies it also to the soul.

“Our intellect is nothing, and our intellectual knowledge is not being…. This means that we are talking about the intellect as the actual having of universal objects, and about perception as the grasping of perceivable things. Not about the eye as a sensory organ, not about the equipment of the soul with the faculty of knowledge. Eckhart has transformed the question of an angel’s knowing and being into a general negative theory of sensory and intellectual recognition and claims. The intellect as such and also perception as such are neither here nor now, and insofar as they are neither, they are nothing, but insofar as they are natural faculties of the soul, they are something” (pp. 95-96).

“Here, in what appears to be an excessively dry critique of the Aristotelian ontology of the schools of the time, Eckhart lays the foundation of his thinking. He is looking for the special condition of the intellectual being, its nonmateriality, its energeia-like unity of knower and knowledge” (p. 99).

“Thus, intellectual knowledge is being God’s form or becoming God’s form, since God also is intellectual knowledge and is not being” (p. 100).

In different contexts, Eckhart says both that God is being and that God is not being.

“In summary, the first Parisian questions seem to be concerned with God and angels, but they are actually exercises in the search for intellectual being. They lead us to the edges of ontology, which cannot grasp image and knowledge. Its consequence is that we imagine God and the soul as thing-like. But that way is best forgotten” (p. 101).

“[W]isdom is infinite. Within it, everything always continues. Where it actually is, it is continually re-created. It is not born once and for all; its eternity is perpetual becoming” (p. 103).

Eckhart clarifies that creation is not meant as an occurrence in time.

“Eckhart, we must remember, permitted everyone so inclined to call God being. Now he proposes to say ‘Being’ (esse) and ‘Justice’ (iusticia) instead of ‘God'” (p. 104).

“God is Being. This tenet remains. But since Heidegger, the sentence has had a different ring to it from what Eckhart intended it to mean” (ibid).

“The human mind is the eagle that ascends to the origins of things” (ibid).

“What Eckhart calls Being is the productivity of the primordial mind, which produces images of ideas that the human intellect grasps as the immanent origin of the experiential things. Being is defined through the intellect, not through presence, not as a whole of facticity” (ibid).

“Being” taken in a positive sense especially means “intelligible being”.

“Primordial mind” is intellect outside of space and time. In this regard, Eckhart is closer to Augustine’s strong emphasis on eternity than to Hegel’s valorization of becoming.

“The philosopher, like the lover, does not look for the origin from which something developed, that is, its efficient cause, nor for what it is good for, that is, its purpose. Analyzing efficient and final causes is indispensable for investigation into natural things, but Eckhart is searching for the pure form as the true Being. He construes the divine life and the life of the deified man, the homo divinus, as a disclosure of form outside efficient and final causes…. [P]hilosophy was the eagle-like ascent to the realm of the grounds of being, the return to living substances that have their purposes within themselves, the elimination of thing-oriented ways of thinking, and the path to a proper life…. The proper human life is the aimless settling into the perpetually new Wisdom that is also Justice and Godhead” (p. 105).

Flasch points out numerous Platonic-sounding phrases in Eckhart, like the “pure form as the true being” above.

That efficient causality has no role in first philosophy is how I read Aristotle. But the neoplatonic commentator Ammonius (a student of Proclus, and teacher of Simplicius, Philoponus, and Damascius) argues that the first cause is also an efficient cause, and not only “that for the sake of which”, as Aristotle says. Most medieval writers (certainly Aquinas) follow Ammonius on this, and assume that the first cause is an efficient cause. Eckhart is an important exception.

Eckhart’s negative conclusion about “final causes” applies to external ends of a utilitarian sort, but ignores Aristotle’s emphasis on entelechy, which involves precisely an end that is intrinsic to a being’s being what it is. I want to say that we are our ends, as confirmed by our actions. In Eckhart as in many medieval writers, the later construct of univocal “substantial form” takes over most of the large role that Aristotle assigns to entelechy. It is admittedly hard to see entelechy as completely independent of time, which I think is what leads Hegel to reverse the traditional order and make eternity dependent on becoming.

“Eckhart’s God sheds the regalia of otherworldly imperial honors and endorses man as his own kind” (ibid).

Eckhart develops a theology that clearly rules out what Brandom rightly decries as the “command-obedience model” of normativity. As in Plotinus, a human’s connection to the Good instead involves an intimate sharing, and even a kind of reciprocity.

“The active above attracts the initially passive below. The below becomes the eagle that flies up to the hidden grounds of the world. It is our reifying contemplation that does not recognize the coincidental dynamic in the process between the above and the below” (ibid).

The active above works as an attractor. This is important. Though Eckhart doesn’t seem to explicitly talk about the teleology that Kant called “internal” and that on my reading is the mode of operation of the first cause in Aristotle, he nonetheless seems to come to a similar conclusion. For both Eckhart and Aristotle, the “below” is attracted to the “above”. But Eckhart is closer to Plotinus and the monotheistic mainstream in his insistence that the First is a source as well as an end.

“Eckhart declares… that he intends to proceed as a philosopher, and he adheres to this stated method. He aims to answer all or almost all questions about God with philosophical arguments, and in clear and simple terms…. This aspiration appears so impracticable, so immoderate that some Eckhart scholars have felt the need to understate it in order to present Eckhart in a better light. But Eckhart asserted this claim sharply and clearly. We can choose to reject it, but we should refrain from reinterpreting and changing it” (p. 109).

“The intellect is supernature. Plato’s intellectual world will become Leibniz’s ‘realm of grace'” (p. 111).

“Every reader of Eckhart has to fight his own imagination, which presents justice to him like an additional property of a person that is dependent on the person” (ibid).

“Eckhart’s God is Being and Unity, Justice and Wisdom. He is the all-encompassing attraction or love…. God is the original formal act, the primus actus formalis…; he discloses the having of form.” (ibid).

Again we have attraction, rather than a making, a push, or a command.

“The primary determinations attract to themselves everything that follows” (p. 112).

And again we have attraction. By this description, Eckhart’s primary determinations are after all what Aristotle would call ends that are sought for themselves, and not for the sake of something else.

“What matters in the context of moral actions is the intention, not the external act…. This justice is before and outside external actions” (ibid).

Eckhart is not the only medieval philosopher to say something like this. Peter Abelard similarly emphasizes the importance of intentions in ethics.

“Justice, in Eckhart’s writings, becomes the life of the mind. Thus, the just man finds peace in works and does not expect rewards; his ethical actions have value in themselves” (p. 113).

One of the charges against Eckhart was that he denied the importance of external works and ritual observances. But the context was implicitly things done for the sake of something else. That, I presume, is what Eckhart meant. But ethical actions have value in themselves. They have their end in themselves. They are not done for the sake of something else. And, he says according to Flasch, the just man finds peace in works. Whatever may be said about his relation to orthodoxy, Eckhart is on firm Platonic and Aristotelian ground here.

“Eckhart does everything he can not to construe God’s relation to the world as having developed arbitrarily, although there are people who imagine that this is precisely what proves the freedom of a personal God” (p. 119).

Like Albert the Great as previously discussed by Flasch, Eckhart puts intellect decisively ahead of will in his theology. To my layman’s eye Aquinas seems to formally maintain the same, but to make more concessions to voluntarism.

“Only thinking overcomes the false imagination to which many people succumb: they imagine God and the world as separate and relate the two as efficient cause and effect” (p. 121).

So there is someone else besides Aristotle who agrees that the first cause is not an efficient cause.

[I]n divinis, that is, in the nature of God, but also in the homo divinus, in grace and salvation, there is no place for the category of causality, only the category of the ideational ground of reason, of ratio, which shows itself as disclosure of form. Aquinas described grace in man as the presence of God as efficient cause…. Eckhart’s philosophical reform consisted also of silencing the voice of efficient causality. Only grounds of an ideational-formal kind are at once wholly immanent and wholly transcendent…. They make possible the qualified concept of the living that has its telos within itself, just as Aristotle conceptualized it in the twelfth book of his Metaphysics” (p. 122).

Aha, now we even get living with a telos within itself, and a reference to book Lambda. Previously we saw him exclude external “final causes”, while remaining silent about the “internal” kind that are of far greater interest. But here the internal kind seems to be affirmed.

Eckhart’s first commentary on Genesis “rests on the combination of the Neoplatonizing metaphysics of Being and Oneness with the doctrine of intellect as presented by Anaxagoras, Aristotle, and Averroes and as corresponding with Augustine’s theory of mens. Eckhart’s anthropology, like his philosophical theology, is also a theory of intellect. This becomes especially clear when Eckhart speaks of man as God’s image. The Platonizing metaphysics of Being joins the philosophy of intellect and produces an ethics. Eckhart’s ethics presents the concept of the homo divinus” (ibid; see also The Goal of Human Life; Properly Human, More Than Human?).

“Eckhart writes that the reader should take the Biblical narrative as parable. He is supposed to let go of the narrative as events and facts” (p. 125).

“If someone says that God commands, then his commanding is to be interpreted in the light of his intellectual nature: his is not an external commanding. He is not ordering about. His ordering consists in providing things with their form” (p. 127).

Those who have understanding do not need to be commanded to be good. Commands are for those who lack understanding.

“The intellect is the root of freedom…. The goal of acting freely is to become a deified man, homo divinus. Within the deified man, the just man and justice are one. For him, the Good itself is the goal and in itself is its own reward. He does not look for external reward. Punishments, too, are intrinsic to acting. The good life consists of a consequent inner orientation, of inner being, not of doing. Action implements the way to being and life. God does not order any external act” (pp. 128-129).

In his commentary on the Book of Wisdom, Eckhart “continues his battle against the advancement of reified ideas, as though Being were a retrospective abstraction of many things or as though it were added to things in the form of a property. It is a rejection not so much of the representation of things in the imagination as of their dominance within philosophical thought” (p. 132).

“Eckhart recommends substituting primary determinations’ names for one another as a method. We may as well say Being instead of ‘God’ or Oneness or Justice or Wisdom. This was not uncommon among philosophers; Plato said ‘the idea of the Good’ instead of ‘God’ when he was not referring to the gods of popular religion; Aristotle, ‘the prime unmoved mover’, Avicenna, ‘the necessary being’, Aquinas , ‘being that exists by itself'” (p. 135).

“As we have seen, other primary determinations, such as Oneness, Wisdom, and Justice, are supposedly uncreatable. If God is called the esse, it is also uncreatable. Different meanings of ‘esse’ are operating here. Readers of Eckhart have to learn how to handle the flexibility of the concept” (p. 136).

“‘Many,’ Eckhart says, imagine creation as an effecting, as it were, toward the outside” (p. 137).

“Eckhart also rejects the idea that man should act well in order to receive earthly and heavenly rewards. The ethical good is an intrinsic value, not a means to an end” (p. 192).

“The sermons criticize the theology of the time, not just the wrong kinds of living. They correct the dominance of the imagination of stable, ontologically autonomous things, which hinders man from understanding himself and God and from grasping that his ‘neighbor’ lives beyond the ocean, too” (p. 198).

“The humble man compels God so that God must give himself according to his nature, and indeed must give himself wholly, for he is indivisible. God must: that is the message. His grace is not a random selection of blessed individuals out of a mass of sinners. God must; this motif appears again and again, not in the sense of an external compulsion, but rather from his nature, which he follows freely. Thus, he gives me everything that he gave Jesus, without exception; he gives the soul the power to birth; and thus it births itself and all things” (p. 200).

Peter Abelard, who was interested in safeguarding divine goodness, had argued more generally that God can only do what he does. Albert the Great had argued for the possibility of purely natural beatitude.

“Someone who speaks of God but does not talk about his oneness with the ground of the soul is not speaking of the true God. The ground of the soul has nothing in common with anything; it is not like anything else and is thus like God” (p. 201).

Here again we have Eckhart’s version of the intellectual soul. The “ground of the soul” would presumably be intellect, since it is described in the same terms.

“The soul exists more in Justice than in the human body” (p. 210).

The human soul carries intellect and the One within it, Eckhart might affirm with Plotinus. Plotinus is the only other writer I can think of who has as exalted a view of the soul as Eckhart.

“One does not learn the correct understanding of the world from the Bible; one must have developed this understanding in order not to read the Bible mindlessly” (p. 212).

“‘Reason’ needs to be conceptualized differently than a ‘power’. It is by no means a sort of mental hand that grasps something and thereby comprehends it” (p. 213).

The Reason he wants to call upon is about the interpretation of form.

“The truly wise life consists not in contemplative joy, but rather in the directing of external action to the best thing that love demands (p. 222).

Here we see how he does make a place for external action.

“The just man exists in Justice. No vision or intuition tells us this is possible, but only the philosophical analysis of the concrete’s containedness within the universal (abstractum) — with a realism of universals taken for granted” (p. 229).

Realism about universals here seems to acquire both a distinctive ethical dimension, and something like a neoplatonic “procession” from the universals in the soul that I have not encountered before in discussions of realism and nominalism.

“In pre-nominalist fashion, Eckhart takes it for granted that Justice (Truth, Wisdom, Goodness) is the common and real determinant shared by all just men and then proceeds by eliminating the idea of making regarding the activity of Justice (Truth, Wisdom, Goodness)” (p. 227).

Eliminating the idea of making in thinking about the activity of justice makes sense as part of a program of de-emphasizing efficient causes and accidents in favor of substance and internal telos, such as it now seems Eckhart supported.

Aquinas on the Soul

Lately I’ve repeatedly mentioned Thomas Aquinas (1225-1274), and I feel some additional due diligence is in order. Though I have browsed his major works, I am assuredly no Aquinas scholar, so I want to tread carefully. This is an exploration, and conclusions may be revised.

My currently interrupted arc treating Alain de Libera’s Archaeology of the Subject has brought to light some unfamiliar suggestions regarding Aquinas’ role in the formation of the modern concept of action as a central explanatory term. Act, action, and actuality are three distinct things in Aristotle, and they seem to be three different distinct things in Aquinas. We have to be careful that all these distinctions are not confused. So, I am embarking on a little detour to get a clearer sense of what they specifically mean in Aquinas.

The most famous theologian of the Catholic church, Aquinas is a very substantial figure whose work has given rise to diverse interpretations. His principal concern was what is called revealed theology, which properly speaking is outside my scope here, but he was perhaps best known (and initially controversial) for his philosophical theology, and for fusing discourses of theology and philosophy. Without ever losing sight of things he considered to be known by faith, he gave an unprecedented place to philosophical arguments in his theological works, and also developed a highly original purely philosophical theology, which he held to independently point in the same direction as his revealed theology.

Contrary to the myth that the Latin middle ages were dogmatically Aristotelian, the place of Aristotelian learning and the social status of philosophy in Aquinas’ lifetime were actually quite precarious, encountering widespread opposition from religious conservatives. Were it not for the conciliatory work of Aquinas and its eventual acceptance by the Church, conservatives might have succeeded in rolling back the great cultural advances that began in the 12th and 13th centuries with the influx of Arabic, Hebrew, and Greek learning into the hitherto rather barbarous world of Latin-speaking Europe. If I often sound critical of Aquinas and disagree with his extraordinarily original redeployment of some key Aristotelian terms, that should be taken in the context of this larger historical debt.

On the question of the soul, Thomist scholar Ralph McInerny explains in the Stanford Encyclopedia of Philosophy that Aquinas in questions 75 and 76 of the first part of Summa Theologica distinguishes between a substance and a “subsistent”. He also develops a concept of a being’s actus essendi or “act of existence”. Both of these details — which have no precedent in Aristotle — are new to me. This is the same part of Summa Theologica that de Libera was focusing on.

The human soul for Aquinas is not an independent spiritual substance as an angel would be; rather it is the subsistent substantial form and formal principle of an embodied human being. It makes the human what she is, but is not complete in itself. As a principle of a nature, it has no nature of its own, and is not a substance in its own right. Its nature is to be the formal element of a complete (embodied) substance.

According to McInerny, Aquinas stresses that “the soul exists in a living being as the substantial form of an animal”. Socrates as a human has all the vital activities of a living animal. For Aquinas none of these are distinctive activities of the soul itself, because they are involved with bodily functions. On the other hand, the intellect of Socrates is said by Aquinas to be a distinctive activity or “operation” of Socrates’ soul itself that involves no corporeal organ, and this operation is said to be able to exist independent of the body.

Aquinas acknowledges this to be an unnatural state, since the soul is not complete in itself. But he holds that it is enough to establish that the human soul has an operation that does not depend on a bodily organ, in order to show that the human soul is an incorporeal subsistent that can exist independent of the body. Souls of nonhuman animals have no nonbodily operation, and therefore are not immaterial subsistents. At the same time, the intellectual soul of a human is distinguished from an angel precisely because it is the substantial form of an animal.

Taking it as established that Socrates as an embodied human being is not the same as the soul of Socrates, Aquinas according to McInerny argues that Socrates and his soul nonetheless are both “subjects” of one identical activity or operation. Intellect is an activity of Socrates’ soul that is equally an activity of Socrates the complete human. Aquinas holds that for an animal with an intellectual operation, the intellectual soul and the animal (and vegetable) soul are one and the same.

McInerny summarizes, “In the case of other animals it is the animal itself, the living substance, that is the subject of the act of existence, and both soul and body have existence through the substance. Here in the human case, the soul is said to be the subject of the act of existence because it has its own operation.”

Rationality — or acting knowingly and willingly — “is the distinctive form that intelligence takes in human beings as animals. Rationality involves the back and forth of argument moving from one thing known to another, and advancing in knowledge by such movement. Thus, for Thomas, while angels and God can be said to be intelligent, they are not rational.”

“Reason does not distinguish us from animals; it distinguishes us as animals. So according to Aquinas, while it is true that the activities of intellect and will are not the actualities of any physical organs, they are nonetheless the activities of the living human animal. It is Socrates the animal who knows and wills, not his mind interacting with his body.”

If acting knowingly and willingly has the plain ordinary meaning it does in the discussions of responsibility in Aristotle’s Nicomachean Ethics, I could fully subscribe to each individual statement in the last two paragraphs. This has no fancy metaphysical prerequisites. But a premise about acting knowingly and willingly does not seem to me to justify a conclusion about the activities of knowing and willing as such. Nor do I think that knowing and willing is the proper activity of Aristotelian nous or “intellect”.

(I think even Averroes would agree that it is Socrates the animal who “knows and wills”, in the sense that those terms have in Aristotle’s ethics. I think he would like the distinction between intellect and the reason of the rational animal. But I think Averroes would go on to specify that knowing and willing and rationality attach to the animal by way of a development of the animal’s “imagination”. I would myself also emphasize the role of language and ethos.)

I am not sure about calling intellect an operation “of the soul itself”, or indeed an “operation” at all. But I truly have no idea what an “act of existence” would be in Aristotelian terms. Plotinus spoke of the natural act of a being as its good. But “act of existence” to my ear suggests something more like Spinoza’s conatus or effort to exist, which seems at least in part to have a Stoic heritage. Neither of these meanings seems applicable to God. But then, neither is it yet clear to me how the “act of existence” of a created being is related to Aquinas’ notion of the pure act of pure Being, which I have understood as conferring the existence of beings.