The Stoic theory of movement has never been the object of a deep investigation despite the considerable number of sources in Neoplatonist commentators. This paper explores for the first time the Stoic notion of ἐνέργεια, which plays a fundamental role in the Stoic conception of movement and generally in the characterization of interaction between bodies. I will show that the Stoics identified movement and activity, so that everything that is active is necessarily moved. This implies that the Stoics merely characterized (...) ἐνέργεια in a dynamic or kinetic sense, namely by connecting it with movement. In order to prove the coherence of this philosophical position to the Stoic doctrine, I will display the compatibility of Neoplatonists’ reports with other sources. Accordingly, I will claim that the Stoics conceived this peculiar sense of ἐνέργεια in reaction to Aristotle, who clearly distinguished between ἐνέργεια and κίνησις in his physical theory. (shrink)

This paper discusses continuity between ancient Pythagoreanism and the pseudo-Pythagorean writings, which began to appear after the end of the Pythagorean school ca. 350 BC. Relying on a combination of temporal, formal and substantial criteria, I divide Pseudopythagorica into three categories: 1) early Hellenistic writings ascribed to Pythagoras and his family members; 2) philosophical treatises written mostly, yet not exclusively, in pseudo-Doric from the turn of the first century BC under the names of real or fictional Pythagoreans; 3) writings attributed (...) to Pythagoras and his relatives that continued to appear in the late Hellenistic and Imperial periods. I will argue that all three categories of pseudepigrapha contain astonishingly little that is authentically Pythagorean. (shrink)

The Mode of Relativity in Agrippa’s Five Modes does not fit with the other four modes, and disrupts an otherwise elegant system. We argue that it is not the familiar argument from epistemic relativism, but a formal condition on the structure of justifications: the principle that epistemic grounding relations cannot be reflexive. This understanding of Agrippan Relativity leads to a better understanding of the Modes of Hypothesis and Reciprocity, a clearer outline of the structure of Agrippa’s system as a whole, (...) and a new insight into the Two Modes that follow the Five. (shrink)

In this paper I will reconsider the doxographical text about Aristotle in Clement of Alexandria's Protrepticus 5.66.4: οδν δ ομαι χαλεπν νταθα γενμενος κα τν κ το Περιπτου μνησθναι· κα γε τς αρσεως πατρ, τν λων ο νοσας τν πατρα, τν καλομενον ‘πατον’ ψυχν εναι το πντος οεται· τουτστι το κσμου τν ψυχν θεν πολαμβνων ατς ατ περιπερεται. γρ τοι μχρι τς σελνης ατς διορζων τν πρνοιαν, πειτα τν κσμον θεν γομενος περιτρπεται, τν μοιρον θεο θεν δογματζων.

Du point de vue méthodologique et épistémologique, la vision occupe une place privilégiée dans les œuvres de Galien de Pergame, ce qui explique les tentatives répétées de ce dernier pour en expliquer le fonctionnement. En partie grâce à la dissection et à la vivisection pratiquées sur des animaux de différentes espèces, il développa une connaissance détaillée de l’anatomie de l’œil, du nerf optique, du cerveau, des muscles oculaires et du système vasculaire cérébral et oculaire. Il utilisa avec habileté cet impressionnant (...) savoir anatomique pour élaborer une explication détaillée de la physiologie de la vision. Pour expliquer comment voient les êtres humains, il fit également appel à l’optique mathématique, notamment à l’optique euclidienne. Cependant, en dépit d’efforts remarquables pour intégrer anatomie, physiologie et mathématiques dans une unique théorie cohérente de la vision, une analyse plus attentive montre que son explication de la vision n’est pas exempte de lacunes non négligeables, de difficultés non résolues et de tensions internes. (shrink)

Galen's æuvre presents a remarkably varied body of texts–varied in subject matter, style, and didactic purpose. Logical tracts sit alongside tomes of drug–lore; handbooks of dietetics alongside anatomical investigations; treatises of physiology alongside ethical opuscula. These differences in type have received some, though as yet insufficient, scholarly attention. Mario Vegetti demonstrated the coexistence of two ‘profili’ or images of the art of medicine: Galen presents the art as an Aristotelian deductive science, on the one hand, and as a technician's craft, (...) on the other. The former image, offering an ambitious elevation of the doctor's cultural status, has medicine as a philosophical episteme analogous to the mathematical sciences, exercised above all to provide causal accounts and logical demonstrations, and centred on the knowledge of anatomy. The second image is that of the clinician, concerned with the body in its pathological manifestations and using as its prime model the ‘pre-anatomical’ theory of the humours. And the content of the treatises shifts in relation to this dual image: ‘profilo alto’ and ‘profilo basso’ are reflected in different types of work. Polemical writings such as the Protrepticus, as well as the great treatises of anatomy and physiology, De usu partium and De naturalibus facultatibus, present medicine in the former light, while works like De temperamentis or Quod animi mores base themselves on humoral pathology and accord with the earlier, artisan-like image. (shrink)

Aristotle says at the start of the De interpretatione that words symbolise thoughts, which are in turn likenesses of things. The present paper argues that he is speaking here primarily of the signification of whole sentences, and at most secondarily of the semantics of individual words. This proposal is defended by drawing attention to a shift in the meaning of ‘sign’ and cognate terms that occurs in the course of the first chapter, one which enables us to separate the way (...) in which words ‘signify’ thoughts (declarative, interrogative, etc.), by expres­sing them, from the more narrowly semantic way in which, subsequently, they are said to signify things. Aristotle’s famous opening state­ment finds its main application, not in the rudimentary grammar of nouns and verbs that follows in chapters 2-3, but later in the treatise, and above all in chapter 14, where it is invoked to establish for dialectical purposes that the relation between a sentence and its negation is the strongest of all contrarieties. Aristotle’s insis­tence, in this same treatise, on the conventional character of language is also explained: for in chapters 8 and 11 it is because of the conventionality of language, and its consequent failure to map systemati­cally onto the divisions between things, that what is in surface grammar a single sentence may turn out to be in reality two or more sentences, in other words, to signify (i.e. express) two or more different thoughts. Aristotle’s primary focus on the meanings of entire sentences is thus explained by the role of the De interpretatione as a work ancillary to dia­lectic, a discipline for which the relation between contradictory pairs of assertions is fundamen­tal. In addition, such a focus is argued (with a comparison to the Stoic lekton) to reflect Aris­totle’s teleological frame of thought. (shrink)

It is usually assumed that Apuleius gave one of his characters the name ‘Thrasyllus’ because of its etymological connection with θρασ. Indeed it is singularly appropriate and Apuleius himself draws attention to the fact: Thrasyllus, praeceps alioquin et de ipso nomine temerarius… . However, it does not follow that a name with such an etymological significance can have no other connotations: in this note I suggest that there is a further frame of reference behind ‘Thrasyllus’ and that Apuleius may have (...) expected his readers to realize this. (shrink)

Alexandre d’Aphrodise et Origène sont deux philosophes et professeurs de philosophie semi-contemporains qui composaient le même genre d’œuvres. Origène était un philosophe chrétien, ancien élève d’Ammonius Saccas, le maître de Plotin. Il est très probable qu’Origène connaissait les écrits d’Alexandre d’Aphrodise, qui étaient lus à l’école de Plotin, et fut inspiré par eux. Beaucoup d’éléments soutiennent ma thèse. Par exemple, le Traité des Principes d’Origène dans sa structure est probablement emprunté à l’œuvre homonyme d’Alexandre d’Aphrodise ; l’expression ἦν ποτε ὅτε (...) οὐκ ἦν est utilisée pour la pre­mière fois – ce qui est très intéressant – justement par Alexandre et par Origène, qui très probablement la transféra du débat philosophique sur l’éternité du cosmos à la théologie trinitaire chrétienne ; la notion d’hypostase comme « substance indi­viduelle », qui devient technique chez Origène et exercera une influence énorme sur la théologie trinitaire chrétienne, était présente dans le Moyen Platonisme, ainsi que chez des auteurs médicaux du Haut Empire qui très probablement inspi­rèrent Origène, et peut-être chez Alexandre aussi ; Origène modifie la doctrine stoïcienne de la mixtion dans un sens qui s’approche d’Alexandre et de sa critique de cette doctrine ; la conception de ὕλη/ὑποκείμενον et εἶδος chez Origène révèle des influences manifestes d’Aristote et peut-être d’Alexandre ; la présentation et la réfutation de la pensée déterministe stoïcienne sont les mêmes chez Alexandre et Origène ; la théorie de Dieu comme Intellect et toute la caractérisation de Dieu a des parallèles étonnants chez Alexandre et Origène ; la doctrine de l’âme et celle des Idées aussi ont des ressemblances impressionnantes chez les deux philosophes. La relation d’Origène à la philosophie (qui fait l’objet d’un débat critique) est éclaircie à la lumière des nouvelles contributions de la présente recherche. (shrink)

Simplicius’ Commentary on Aristotle’s Categories contains the most extended testimony about the Stoic conception of acting (ποιεῖν) and undergoing (πάσχειν). Simplicius ascribed to the Stoics the idea that acting and undergoing are to be reduced to the movement. To this opinion Simplicius opposed the Aristotelian view according to which acting and undergoing are two different categories. In this paper I intend to outline the original Stoic position comparing the reportage of Simplicius with other Stoic sources. Later, I will deal with (...) Boethus’ defense of the distinction between the categories of acting and undergoing. I will argue that Boethus directly reacted against the Stoic opinion reformulating it in Aristotelian language. (shrink)

En este artículo argumento en contra de una intervención textual, sugerida por Moraux y adoptada por Chiesara, a una línea del tratado de Aristocles sobre la filosofía pirrónica. Esta lectura conservadora me permite resaltar la importancia del contexto en el que se inserta la línea en disputa. Pienso que el pasaje es crucial para la crítica de Aristocles a los escépticos, pues implica un intento consciente, aunque implícito, por unificar dos corrientes distintas del pirronismo: la original, representada por la apropiación (...) de Timón de las palabras de Pirrón, y la más cercana aAristocles, representada por Enesidemo. (shrink)

Le Discours contre le Discours « De Domnus » rend compte d’un triple débat, dans lequel trois personnages interviennent sur la question des « incorporels », point difficile de la doctrine stoïcienne. La polémique rédigée par le stoïcien Bardesane, en réaction aux positions du platonicien Albinus, a été examinée par Éphrem le Syrien, chrétien et polémiste antibardesanite. Il est l’auteur du Discours et notre seule source d’information sur cette controverse. Or, la manière dont Éphrem aborde la question litigieuse est spontanément (...) platonicienne, parfois proche du stoïcisme, mais fondamentalement, il s’agit d’une étonnante lecture théologique d’un thème qui fait débat entre les écoles philosophiques. (shrink)

_ Source: _Volume 62, Issue 1, pp 69 - 89 Galen’s physiology—his theory of elements, mixtures and the emergence of natural capacities—compels him to conceive of each part of the soul as a peculiar mixture of elementary qualities in the material substance of the organ in which it is located. The reason why Galen, nevertheless, refrains from making a dogmatic assertion about the substance of the soul, or of human nature in general, is the acknowledged failure to account for two (...) goal-directed activities—the formation of bodily organs and human intelligence—in terms of elementary qualities and their mixtures. (shrink)

I have argued elsewhere that the idea that Aristotle aspired to improve the theories of the planetary motions of Eudoxus and Callippus by adding the ‘counteracting’ spheres (ἀνελίττουσαι) first emerged with the Peripatetic exegete Sosigenes in the second century CE. This paper supplements that argument by contrasting two major lines of interpretation of the astronomical system set out in Metaphysics Λ.8: Adrastus of Aphrodisias’ widely ahistorical account, and Sosigenes’ attempt to save Aristotle against later developments of astronomical science.

Avicenna's analysis of the definition of substance and accident repeatedly emphasizes two points: one and the same essence cannot be substance in one instance and accident in another; whetherxis extrinsic or intrinsic for an underlying subject,ydoes not tell us anything as to whetherxis substance or not. Both points are development in an argument against certain unnamed people who claimed the opposite. In this article I will show that Avicenna's opponents are to be identified with the mainstream Baghdad Peripatetic School which (...) based itself on the Late Antique rule that “parts of substances are substances”. As for Avicenna's own position, it was developed on the basis of the heterodox position of Yaḥyā b. ʿAdī, who anticipated Avicenna's first point. This is a further piece of evidence for something that has only recently begun to be appreciated: the influence of Ibn ʿAdī on Avicenna.RésuméL’analyse d’Avicenne portant sur les définitions de la substance et de l’accident met en exergue les deux propositions suivantes: 1) la même essence ne peut être à la fois une substance dans un cas et un accident dans un autre; 2) le fait quexsoit extrinsèque ou intrinsèque à unysous-jacent ne nous permet pas de conclure quexest une substance. Ces deux propositions sont articulées dans un débat avec d’autres personnes ayant un point de vue opposé dont on ne connaît pas l’identité. Dans cet article, nous verrons que ces adversaires font partie de l’école péripatétique de Bagdad, qui elle-même s’appuie sur une proposition datant de l’Antiquité tardive et selon laquelle les parties de substances sont elles-mêmes des substances. La position d’Avicenne fut développée à partir de celle de Yaḥyā b. ʿAdī. Cet article apporte ainsi un argument nouveau qui met en évidence l’influence, remarquée seulement depuis peu, d’Ibn ʿAdī sur Avicenne. (shrink)