Plotinus on the Soul is a study of Plotinus' psychology, which is arguably the most sophisticated Platonist theory of the soul in antiquity. Plotinus offers a Platonist response to Aristotelian and Stoic conceptions of the soul that is at the same time an innovative interpretation of Plato's Timaeus. He considers the notion of the soul to be crucial for explaining the rational order of the world. To this end, he discusses not only different types of individual (...) soul but also an entity that he was the first to introduce into philosophy: the so-called hypostasis Soul. This is the first study to provide a detailed explanation of this entity, but it also discusses the other types of soul, with an emphasis on the human soul, and explains Plotinus' original views on rational thought and its relation to experience. (shrink)

In On the Soul and the Resurrection, St Macrina and St Gregory of Nyssa consider what the soul is, and its relationship to our body and identity. Gregory notes the way that our bodies are always changing, and asks which is most truly our ‘real’ body if we are always in a state of growth, decay and transience? What physical body will be with us at the resurrection? If our body is as important to our identity as our (...) soul, then who am I when my body changes? Macrina answers that our identity is bodily, but that the sufferings and passages of time that alter our bodies mean that we are an imperfect version of ourselves in this life. The person that we will be at the resurrection will be free from the influence of evil and the ravages of impermanence. Modern-day science fiction wrestles with Gregory’s problem—where is my identity located? If my body is altered beyond recognition, or my mind transferred to a new body, am I still me? These cyberpunk and transhumanist worries call to mind the ancient topic of mind/body dualism, and Macrina and Gregory have some surprisingly relevant insights to offer to our contemporary technological dilemmas. (shrink)

This work offers a study on the problematic of a scientific knowledge of the sensible reality in the Enneads.

Essays on The Soul's Logical Life in the Work of Wolfgang Giegerich: Psychology as the Discipline of Interiority is the second collection of essays dedicated to the study and application of Psychology as the Discipline of Interiority - a new 'wave' within Analytical Psychology which pushes off from the work of C. G. Jung and James Hillman. Reflecting upon the notion of psychology developed by German psychoanalyst Wolfgang Giegerich, whose Hegelian turn sheds light on the notion of soul, (...) or the objective psyche, and its inner logic and 'thought', forming a radical new basis from which to ground a modern psychology with soul. The book explores the theme of "the soul's logical life" as it displays itself in various modern phenomena, from overwhelming anxiety, cryptocurrency, the dreams of Japanese college students, and contemporary psychoanalysis, to myth, music, social movements, and the question and relevance of truth in psychology and consciousness. The authors, comprising clinical psychologists, teachers, Jungian analysts, and international scholars, aim to reveal and convey the dialectical inner workings and speculative logic of the modern soul. Essays on The Soul's Logical Life in the Work of Wolfgang Giegerich: Psychology as the Discipline of Interiority will be essential reading for depth and clinical psychologists, Jungian psychoanalysts, and academics and students of post-Jungian studies, and for all those interested in what it means to think in the highly sophisticated and technological world of the twenty-first century. (shrink)

This volume features essays that explore the insights of the 14th-century Parisian nominalist philosopher, John Buridan. It serves as a companion to the Latin text edition and annotated English translation of his question-commentary on Aristotle's On the Soul. The contributors survey Buridan's work both in its own historical-theoretical context and in relation to contemporary issues. The essays come in three main sections, which correspond to the three books of Buridan's Questions. Coverage first deals with the classification of the science (...) of the soul within the system of Aristotelian sciences, and surveys the main issues within it. The next section examines the metaphysics of the soul. It considers Buridan's peculiar version of Aristotelian hylomorphism in dealing with the problem of what kind of entity the soul (in particular, the human soul) is, and what powers and actions it has, on the basis of which we can approach the question of its essence. The volume concludes with a look at Buridan's doctrine of the nature and functions of the human intellect. Coverage in this section includes the problem of self-knowledge in Buridan's theory, Buridan's answer to the traditional medieval problem concerning the primary object of the intellect, and his unique treatment of logical problems in psychological contexts. (shrink)

A topic common to both Plato’s and Aristotle’s discussions of theories of the soul is the doctrine of the soul as a harmony of the parts of the body. Plato’s Phaedo as well as Aristotle’s De anima and Eudemus present this theory and argue against the identification of the soul as a harmony. This paper has two focuses, one philosophical and one historical. First, I will focus on the argumentation used by Aristotle in his dialogue Eudemus, which (...) is often associated with Aristotle’s early attachment to Plato. On the basis of the argumentation against the harmonia theory, I will try to show that the Eudemus is not a dialogue that depicts Aristotle’s Platonic phase. Instead, by comparing the arguments of the Eudemus with both Plato and Aristotle’s mature thought, I will argue that the argumentation of the Eudemus seems to be an indirect attack on Plato’s view on the Forms and on the nature of the soul, and that it seems to be consistent with Aristotle’s mature work On the Soul. Second, given that Aristotle discusses this topic twice, I will try, also on the basis of conclusions about the Eudemus and on later reception of Aristotle’s arguments, to show why this is the case. (shrink)

In examining Ennead VI 4[22], we find Plotinus in conflict with modern, i.e., Cartesian or Kantian, assumptions about the relation of soul and body and the identification of the self with the subject. Curiously, his images and exposition are more in tune with Twentieth Century notions such as wave and field. With these as keys, we are in a position to unlock the subtlety of Plotinus' analysis of the way soul and body are present together, with sensation structured (...) through the body and judgment coming from the soul. The problem of the self concerns not only the unity of the self in terms of body and soul, but also how the self is constituted in relation to other selves, both keeping its individuality and sharing its experiences at the same time. (shrink)

This article comments on a paper titled ‘Technique et eschatologie: le devenir des objets techniques’ that Gilbert Simondon presented in 1972. For Simondon, eschatology consists of a basic presupposition, which is the duality between the immortal soul and the corruptible body. The eschatology of technical objects can be seen as the object’s becoming against time. Simondon suggests that in the epoch of artisans, the product through its perfection searches for the ‘immortality of his producer’, while in the industrial epoch (...) standardization becomes the key mover, in the sense that different parts of the object can be replaced. This analysis of Simondon on the relation between technics and eschatology allows a speculation on the soul of technical objects by tracing his earlier works. This conception of the soul, as this article tries to show, allows Simondon to address the alienation of technical objects in juxtaposition to a Marxist critique of alienation. (shrink)

Aristotle's De Anima is one of the great classics of philosophy. Aristotle examines the nature of the soul-sense-perception, imagination, cognition, emotion, and desire, including, memory, dreams, and processes such as nutrition, growth, and death.

Plato's central contribution to psychology is his theory of the tripartite soul. This is at once a theory about the nature of the embodied human soul and a theory of human motivation. This article emphasizes on the importance and immortality of the soul. Plato does say that perceptible particulars derive their names from the forms they partake of their souls. One of his arguments against the harmonia theory of the soul, put forward by Simmias, relies on (...) the occurrence of conflicts between desires and also of conflicts between how one decides to act and how anger or fear incline one to act. Among other things, he points out that people who are thirsty may nonetheless be averse to drinking. (shrink)

According to Aristotle, the three main varieties of soul – nutritive, perceptual, and rational – are hierarchically ordered. I develop and defend an interpretation of the soul’s unity that centers on Aristotle’s attempt to explain this hierarchy’s organizing cause. Aristotle draws an analogy between this series of souls and the series of figures. I first elucidate the fundamental feature both series share: each series’ prior members are present in capacity in its posterior members. I do so by examining (...) several other cases – mathematical, biological, and physical – where Aristotle appeals to presence in capacity. I then argue that an organism’s living body is continuous by nature. That is, an organism’s soul is the principle, cause, and end of a single, articulate activity of living and each of an organism’s vital bodily movements are aspects or partial manifestations of this unitary, natural activity. This account of natural continuity is, I contend, the key to understanding what it is for one soul to be present in capacity in another. And this account of presence in capacity is, I contend, the key to understanding what it is for a soul that comprises parts to be a unity. (shrink)

The Neoplatonic commentaries on Aristotle’s works have always been considered somehow suspicious. That is partly related to the doctrinal commitments of the commentators, partly with the hermeneutical strategies to which they seem to recur. Both of these reasons have also give place to the accusation of distortion and misunderstanding of Aristotle’s philosophy. In the following paper I want to perform an exercise of disclosing the hermeneutical procedure that one of this commentators applies to one of the passages of the first (...) book of the De Anima. The commentator is Philoponus, the passage is the refutation of the soul-harmony theory. My aim is to show that, despite the doctrinal commitments that the commentator may have, his methodology follows Aristotelian guidelines. I hope that this could open perspectives on the value that the commentators must have as philosophers, rather than merely interpreters or paraphrasers. (shrink)

It is sometimes said that a human being has a soul, whereas animals and lifeless things do not. The distinction made is of significance probably for most religions. Although it sets man apart and places him in a unique category, it should not be taken to imply that there is no difference between what is alive and has sentience, apart from man, and what is lifeless and unconscious. This was Descartes' error. For he ran together several distinctions and equated (...) the soul with consciousness. (shrink)

In this paper I propose to consider a certain set of notions in Kant as subsumable under a single notion – that of the soul’s intensity – as well as the possibility of a transcendental grounding of this notion within Kant ’s critical framework. First, I discuss what it means for Kant to attribute intensive magnitude to the soul, starting with his response to Mendelssohn where Kant introduces the soul’s intensity as a metaphysical notion immanent to the (...) principles of rational psychology. I show, however, that in Kant ’s counter-argument there occurs a subtle though crucial shift in perspective – from the soul’s substance to its powers. Then I move on to consider three fundamental variants upon the soul’s intensity – intensities of representation, of life, and of cognition – each governed, I argue, by the implied notions of measure of intensity and its balance. Also, I examine Kant ’s accounts of the life of a species and the necessity of sickness; of intensity of “enlightenment” in a society and the benefit of ignorance; and of sermon as a practical exertion of cognition’s intensity. Next, the aforementioned shift of emphasis allows me to demonstrate that the notion of the soul’s intensity can indeed be transcendentally justified by appealing to Kant ’s principle of the Anticipations of Perception. Finally, I conclude with an appendix on the possible connection of the soul’s intensity to Kant ’s aesthetics. (shrink)

Discussion of the soul in this essay departs from the concept of the soul that for thousands of years has occupied the attention of philosophers and theologians and pervaded religious discourse. The author is concerned with what William James referred to as ‘the popular soul,’ the soul as it is invoked by expressions such as ‘an expansive soul,’ ‘a soulless person,’ ‘soul-mate,’ and ‘that melody touched my soul.’ Skepticism with regard to the existence (...) of this soul is without warrant. How this soul comes into being and develops; what its essential features are; how the world, when the soul is engaged, is transformed; what its relationship is to one's conscience; its importance in a human life; its connections to purity and perfection, to silence; its survival upon death; and the perils posed today to its development and existence are the principal topics considered. (shrink)

Dieser Aufsatz untersucht Malebranches Begriff von der Macht oder Kraft des Willens, die für Malebranche eine notwendige Bedingung der Freiheit ist. Mein Ziel ist, festzustellen, welcher Art genau die Macht des Willens ist, indem ich Malebranches Hauptdarstellungen zu Freiheit, Sünde und Tugend untersuche. Der problematischste Zug dieser Lehre zeigt sich in Verbindung mit Malebranches Okkasionalismus, einer Lehre, die die kausale Ohnmacht aller spirituellen und materiellen Schöpfung zu benötigen scheint und innerhalb derer Gott das einzige kausal wirkende Wesen ist. Wie wirkt (...) sich dieser Grundsatz auf Malebranches Lehre von der Kraft der Seele aus? Welche Art Kraft ist innerhalb des okkasionalistischen Systems zulässig? Malebranches Antworten auf diese Fragen, die ich in diesem Aufsatz kurz darstelle, enthalten eine wichtige Unterscheidung zwischen dem 'Realen' und dem 'Moralischen' oder dem Ontologischen und dem Deontologischen. Ob diese Unterscheidung Malebranche weiterhilft, ist eine Frage, die ich offenlasse. (shrink)

Reflections on the linkage between and the provocative force of problems in the analogy of city and soul, in the simile-bound characterization of the Good, and in the performative tension between what Plato has Socrates say about the philosopher's disinclination to descend into the city and what he has Socrates do in descending into the Piraeus to teach, with a closing recognition of the analogy between Socratic teaching and Platonic writing.

It is sometimes said that a human being has a soul, whereas animals and lifeless things do not. The distinction made is of significance probably for most religions. Although it sets man apart and places him in a unique category, it should not be taken to imply that there is no difference between what is alive and has sentience, apart from man, and what is lifeless and unconscious. This was Descartes' error. For he ran together several distinctions and equated (...) the soul with consciousness. (shrink)

The commentary attributed to Simplicius on Aristotle's On the Soul appears in this series in three volumes, of which this is the first. The translation provides the first opportunity for a wider readership to assess the disputed question of authorship. Is the work by Simplicius, or by his colleague Priscian, or by another commentator? In the second volume, Priscian's Paraphrase of Theophrastus on Sense Perception, which covers the same subject, will also be translated for comparison. Whatever its authorship, the (...) commentary is a major source for late Neoplatonist theories of thought and sense perception and provides considerable insight into this important area of Aristotle's thought. In this first volume, the Neoplatonist commentator covers the first half of Aristotle's On the Soul, comprising Aristotle's survey of his predecessors and his own rival account of the nature of the soul. (shrink)

Among the corpus of extant Greek works attributed to Gregory the Wonder-worker is a little treatise about the soul addressed to a certain Tatian. A fragment of the same work, which is missing its introductory preface, appears among the works of Maximus the Confessor. In addition, there are two manuscripts of a Syriac translation that also lack the introductory preface. One of these Syriac manuscripts was found at St. Catherine’s at Mt. Sinai and dates from the seventh century, which (...) indicates that the attribution of the work to such a late figure as Maximus the Confessor is incorrect. Yet the work, which I shall call De animafor the purpose of this inquiry, does not exhibit many obvious linguistic parallels with the admittedly quite small extant corpus of Greek works that are securely attributed to Gregory. Moreover, no early external evidence confirms that Gregory indeed wrote a treatise on the soul. In several of the Greek manuscripts as well as in the Syriac manuscripts the work remains unattributed to any author. In this paper I shall argue that: 1. earlier arguments that De anima depends on Nemenius of Emesa’s De natura hominis are dubious 2. the work displays some linguistic parallels with the extant works of Justin Martyr, which may suggest that it was directed at Justin’s student, Tatian the Syrian, either by Justin himself or by another student of Justin. (shrink)

In examining Ennead VI 4[22], we find Plotinus in conflict with modern, i.e., Cartesian or Kantian, assumptions about the relation of soul and body and the identification of the self with the subject. Curiously, his images and exposition are more in tune with Twentieth Century notions such as wave and field. With these as keys, we are in a position to unlock the subtlety of Plotinus' analysis of the way soul and body are present together, with sensation structured (...) through the body and judgment coming from the soul. The problem of the self concerns not only the unity of the self in terms of body and soul, but also how the self is constituted in relation to other selves, both keeping its individuality and sharing its experiences at the same time. (shrink)

The problems that taxed the minds of people during the Renaissance were much the same as those confronting us today. In their perplexity many deep-thinking people sought the advice of Marsilio Ficino, the leader of the Platonic Academy in Florence, and through his letters he advised them, encouraged them, and sometimes reproved them. Ficino was utterly fearless in expressing what he knew to be true. His letters cover the widest range of topics, mixing philosophy and humor, compassion and advice, and (...) offering a profound glimpse into the soul of the Renaissance. This is the only accessible collection of Ficino's writings available in English. (shrink)

The present study seeks to treat in depth a relatively restricted portion of Hegel's thought but one that has not yet received intensive treatment by Hegel scholars in English. In the Hegelian system of philosophical sciences, the Anthropology directly follows the Philosophy of Nature and forms the first of the three sciences of Subjective Spirit: 1 Anthropo logy, Phenomenology, and Psychology. The section on Subjective Spirit is then followed by sections on Objective Spirit and Absolute Spirit. The three sections together (...) comprise the Philosophy of Spirit (Philosophie des Geistes 2), which constitutes the third and concluding main division of Hegel's total system as presented in the Encyclopedia of Philosophic Sciences in Outline. a Hegel intended to write a separate full-scale work on the philosophy of Subjective Spirit as he had done on Objective Spirit (the Philosophy of Right), but died before he could do so. · Thus the focus of our study is quite concentrated. Its relatively narrow scope within the vast compass of the Hegelian system may be justified, 1 Iring Fetscher (HegeUt Lehre vom Menschen, Stuttgart, 1970, p. 11) notes the lack of a modem commentary to Hegel's Encyclopedia, and in particular to the section on Subjective Spirit. Brief accounts of this section in English may be found in: Hugh A. Reyburn, The Ethical Theory of Hegel (Oxford, 1921), Chapter V; and O. R. O. Mure, A Study of Hegers Logic (Oxford, 1950), pp. 2-22. (shrink)

In this paper, I argue that Ockham’s seemingly pessimistic epistemological assessments of what we can know about the human soul and its relation to the body reflect a sound appreciation of what is involved in the theoretical development of philosophy and natural science. In order to make my argument, I first undermine the idea that demonstration was a norm that scholastic disputation regularly expected to achieve; and second, I examine Ockham’s treatment of three major topics in psychology (thus illustrating (...) how alternative intellectual standards were in play in scholastic disputation). (shrink)

Themistius ran his philosophical school in Constantinople in the middle of the fourth century A.D. His paraphrases of Aristotle's writings are unlike the elaborate commentaries produced by Alexander of Aphrodisias, or the later Neoplatonists Simplicius and Philoponus. His aim was to provide a clear and independent restatement of Aristotle's text which would be accessible as an elementary exegesis. But he also discusses important philosophical problems, reports and disagrees with other commentaries including the lost commentary of Porphyry, and offers interpretations of (...) Plato. Themistius' paraphrase of Aristotle's On the Soul is his most important and influential work. It is also the first extant commentary on this work of Aristotle to survive from antiquity. A rival to that of Alexander of Aphrodisias, it represents one of the main interpretations of Aristotle's theory of the intellect, which was debated throughout the Middle Ages and the Renaissance. It continues to be an important text for the reconstruction of Aristotle's philosophical psychology today. (shrink)

In this paper, I argue that Ockham’s seemingly pessimistic epistemological assessments of what we can know about the human soul and its relation to the body reflect a sound appreciation of what is involved in the theoretical development of philosophy and natural science. In order to make my argument, I first undermine the idea that demonstration was a norm that scholastic disputation regularly expected to achieve; and second, I examine Ockham’s treatment of three major topics in psychology (thus illustrating (...) how alternative intellectual standards were in play in scholastic disputation). (shrink)

A critic of metaphysically robust accounts of the human self, Nietzsche means not to do away with the self entirely, but to reimagine it. He pursues an account according to which the unity of the self is born out of a coherent organization of drives and yet is not something other than that organization. Readers of Nietzsche have pointed to a so-called “lack of fit” between this theoretical account of the self, according to which the self is nothing apart from (...) the organization of drives, and Nietzsche’s practical account of human agency, which often seems to require that the self be something more than mere drives. I suggest Nietzsche’s interest in Greek agonistic norms of contest sheds light on this apparent incongruity. Agonistic relationships, insofar as they cultivate contest among diverse forces, are for Nietzsche one appropriate model for the subjectivity of beings whose psychology is similarly characterized by contest among diverse forces—that is, beings like us. (shrink)

In this work, new light is thrown on the philosophical method of the great Stoic Chrysippus on the basis of the fragments preserved by Galen in his De Placitis books II-III. Included is a study of Galen's aims and methodologies.

This text by Philoponus, the sixth-century commentator on Aristotle, is notable for its very informative Introduction to Psychology, which tells us the views of Philoponus, of his teacher and of later Neoplatonists on our psychological capacities and on mind-body relations. There is an unusual account of how reason can infer a universally valid conclusion from a single instance, and there are inherited views on the roles of intellect and perception in concept formation, and on the human ability to make reasoned (...) decisions, celebrated by Aristotle, but here downgraded. Philoponus attacks Galen's view that psychological capacities follow, or result from, bodily chemistry; they merely supervene on that and can be counteracted. He has benefited from Galen's knowledge of the brain and nerves, but also propounds the Neoplatonist belief in tenuous bodies which after death support our irrational souls temporarily, or our reason eternally. (shrink)

One of the main tasks for an account of the Christian doctrine of the atonement is to explain how and in what ways the salvifically relevant work of Christ heals the damage wrought by human sin on our souls, our relationships with one another, and our relationship with God. One kind of damage often neglected in philosophical treatments of the atonement, but discussed at some length in Eleonore Stump’s forthcoming At-one-ment, is what she, following St. Thomas Aquinas, calls the stain (...) on the soul. The stain on the soul comprises the “moral leftovers” of serious evil, damage to the soul that goes beyond the guilt, shame, and separation from God brought about by sin and that lingers in a person even after she has repented and been forgiven. In this paper, I critically examine Stump’s account of how the work of Christ deals with the problem of the stain on the soul. I offer reasons for thinking that if the stain is exactly as she describes it, then it is indelible; and then I explore possible ways forward for her account of the atonement. (shrink)

The limitation of act by potency, central in the metaphysics of Thom as Aquinas, has its origins in Plotinus. He transforms Aristotle ’s horizontal causality of change into a vertical causality of participation. Potency and infinity are not just un intelligible lack of limit, but productive power. Form determines matter but is limited by recepti on into matter. The experience of unity begins with sensible things, which always have parts, so what is really one is incorporeal, without division and separation. (...) Unity is like the esse of Thomas, since it is the act that makes a thing what it is and has its fullness in God. (shrink)

John Blund's Treatise on the Soul is probably the earliest text of its kind: a witness to the first reception of Greek and Arabic psychology at Oxford and foundation for a new area of medieval philosophical speculation. This book contains Hunt's Latin edition with a new English translation and a new introduction to the text by Michael Dunne.

Aristotle's On the Soul aims to uncover the principle of life, what Aristotle calls psuchē. For Aristotle, soul is the form which gives life to a body and causes all its living activities, from breathing to thinking. Aristotle develops a general account of all types of living through examining soul's causal powers. The thirteen new essays in this Critical Guide demonstrate the profound influence of Aristotle's inquiry on biology, psychology and philosophy of mind from antiquity to the (...) present. They deepen our understanding of his key concepts, including form, reason, capacity, and activity. This volume situates Aristotle in his intellectual context and draws judiciously from his other works as well as the history of interpretation to shed light on his intricate views. It also highlights ongoing interpretive debates and Aristotle's continuing relevance. It will prove invaluable for researchers in ancient philosophy and the history of science and ideas. (shrink)

Book synopsis: For the Pre-Socratic philosophers the soul was the source of movement and sensation, while for Plato it was the seat of being, metaphysically distinct from the body that it was forced temporarily to inhabit. Plato's student Aristotle was determined to test the truth of both these beliefs against the emerging sciences of logic and biology. His examination of the huge variety of living organisms - the enormous range of their behaviour, their powers and their perceptual sophistication - (...) convinced him of the inadequacy both of a materialist reduction and of a Platonic sublimation of the soul. In De Anima, he sought to set out his theory of the soul as the ultimate reality of embodied form and produced both a masterpiece of philosophical insight and a psychology of perennially fascinating subtlety. (shrink)

In chapter 5, Philoponus endorses Aristotle's rejection of the idea that the soul is particles and of Empedocles's idea that the soul must be made of all four elements in order to know what is made of the same elements."--Jacket.

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Aristotle's On the Soul: A Critical Guide ed. by Caleb M. CohoeAttila HangaiCaleb M. Cohoe, editor. Aristotle's On the Soul: A Critical Guide. Cambridge: Cambridge University Press, 2022. Hardback, $99.99.Guiding readers through Aristotle's science of the soul, this volume covers many major topics of De Anima (DA) and addresses specific questions, including perennial interpretive problems. The self-contained chapters approach the text either by illuminating its (...) context or by elucidating key psychological concepts. While some contributions refer to relevant [End Page 318] positions by Aristotle's predecessors or contemporary philosophers, connections drawn to other Aristotelian texts predominate. Throughout, the emphasis is on philosophical questions. The result is a first-rate philosophical guide through this densely written treatise, which allows experienced readers of DA to deepen their understanding of Aristotelian psychology. Since most chapters approach interpretive issues from new angles and presuppose familiarity with the existing scholarship, beginners may want to start elsewhere.In Reeve's reading (chapter 1), Aristotle pursues dialectic in DA to define the soul as the first principle for the science of life. He construes dialectic as "going through puzzles and solving them by appeal to endoxa" (21), and equates it with induction from perceptual experience to knowledge of principles and causes. Contesting this view, Carter (chapter 2) argues that the physicist's method is not dialectical because the predecessors' views, conflicting as they are, do not constitute endoxa. Through close readings of DA II.2–5, he shows that Aristotle investigates earlier theories to assess how well they explain the main functions of the soul. One pertinent theory takes the soul to be attunement (harmonia). Shields (chapter 4) elucidates Aristotle's case for hylomorphism as an advance over the harmonia theory. Although harmonia (as the proper arrangement of parts) implies normativity, it falls short of rendering the soul as a final cause with its own good, so it cannot explain the unity of the body. Frey's chapter 5 on the soul's unity deals with this latter function. The problem of unity stems from the fact that each level in the hierarchy of souls—nutritive, perceptual, rational—can be defined independently, yet a posterior soul presupposes the existence of all prior ones. The key Frey uses to understand unity is potential presence. Just as a triangle is present potentially in a quadrangle—for division of the latter yields triangles—so too is the nutritive soul present potentially in the perceptual soul, although not due to a separating act. This, however, has counterintuitive implications: animal nutrition would be the function of a perceptual soul; furthermore, the nutritive soul of the embryo (in Frey's biological example) would first be present potentially (as undeveloped) and, once actualized (when developed), would revert to potentiality (at the development of the perceptual soul). Frey's other proposal is more promising. It turns on the notion of natural continuity: having an internal cause for a characteristic change with a unitary goal. Thus, the soul's unity for Frey (despite his reservations) seems to boil down to teleology: the soul sets a goal achieved through the manifestation of species-specific life functions. Invoking the biology of animal reproduction, Gelber (chapter 6) complements the teleological unity regarding the nutritive soul-part with the unity constituted by the continuity of the processes of nutrition, growth, and reproduction, namely, unity by material and efficient causes.Among the three contributions on reason (nous), Scheiter (chapter 3), examining its separability, breaks with the traditional interpretation and takes Aristotle to show (in DA III.4 and I.3) that reason is independent not only of bodily organs but of any magnitude (megethos). This envisages DA III.4–8 as an investigation into how reason functions as a different kind of capacity. It turns out, according to Kelsey's insightful chapter 11, that reason's actuality—insight (noēsis)—is the same as its intelligible object (noēton), and so intelligibility depends on separation from matter by the actuality of reason, making all and only the immaterial things intelligible and intelligent. Cohoe (chapter 12) draws the conclusion: human reason for Aristotle—being the defining part of the human soul, most... (shrink)