Understanding “what something is” has long occupied philosophers, and no Western thinker has had more influence on the nature of being than Aristotle. Focusing on a reinterpretation of the concept of energeia as “activity,” Aryeh Kosman reexamines Aristotle’s ontology and some of our most basic assumptions about the great philosopher’s thought.

Aristotle's defense of Dunamis -- Power and potentiality -- Rational and nonrational powers -- The priority of actuality -- Ontological hierarchy, normativity, and gender.

When an agent intentionally changes something separate from herself—when, say, she opens a bottle—what is the relation between what the agent does and what the patient suffers? This paper defends the Aristotelian thesis that action is to passion as the road from Thebes to Athens is to the road from Athens to Thebes: they are two aspects of a single material reality. Philosophers of action tend to think otherwise. It is generally taken for granted that intentional transactions must be analyzed (...) in terms of a causal relation. Controversy surrounds the question what the causal relata are: event-causalists claim that both of the relata are events; agent-causalists claim that the first relatum is an agent, and they dispute among themselves whether the second is an event or a terminal state of the patient. But the entire controversy assumes the necessity of some causal analysis of transactions. This paper argues that, far from being necessary, no such analysis is even possible. (shrink)

This book explores a fundamental tension in Aristotle's metaphysics: how can an entity such as a living organisma composite generated through the imposition of form on preexisting matterhave the conceptual unity that Aristotle demands of primary substances? Mary Louise Gill bases her treatment of the problem of unity, and of Aristotle's solution, on a fresh interpretation of the relation between matter and form. Challenging the traditional understanding of Aristotelian matter, she argues that material substances are subverted by matter and maintained (...) by form that controls the matter to serve a positive end. The unity of material substances thus involves a dynamic relation between resistant materials and directive ends. Aristotle on Substance offers both a general account of matter, form, and substantial unity and a specific assessment of particular Aristotelian arguments. At every point, Gill engages Aristotle on his own philosophical ground through the detailed analysis of central, and often controversial, texts from the Metaphysics, Physics, On Generation and Corruption, De Anima, De Caelo, and the biological works. The result is a coherent, firmly grounded rethinking of Aristotle's central metaphysical concepts and of his struggle toward a fully consistent theory of material substances. (shrink)

Exploring what two foundational figures, Plato and Aristotle, have to say about the nature of human awareness and understanding, Aryeh Kosman concludes that ultimately the virtues of thought are to be found in the joys and satisfactions that come from thinking philosophically, whether we engage in it ourselves or witness others' participation.

This book contains the first English translation of Abūl-Walīd Ibn Rushd's (Averroes') so-called Epitome of Aristotle's Metaphysics. The original Arabic text was composed around 1160 as a sort of appendix to a series of compendia of Aristotle's works on natural philosophy by the famous Andalusian philosopher. The two most interesting things about this work are the fact that Averroes restructures here the Aristotelian text according to his own conception of metaphysics, as opposed to his great literal commentary which follows the (...) order of the Metaphysics section by section, and that he constantly revised this work over more than three decades. The present translation is based on a wide range of documents including, apart from the available Arabic editions, a number of medieval Arabic manuscripts not taken into consideration in these editions as well as the Renaissance translation into Latin prepared by Jacob Mantinus. It is accompanied by a commentary dealing with the major philosophical topics, Averroes' sources and problems of the transmission and constitution of the text. In addition, the most important variant readings of the manuscripts are noted in footnotes underneath the translation. (shrink)

This paper examines Aristotle’s analysis of unenacted capacities to show the role they play in his discovery of the concept of actuality. I first argue that Aristotle begins Metaphysics IX by focusing on active and passive capacities, after which I discuss Aristotle’s confrontation with the Megarians, the philosophers who maintain that a capacity is present only insofar as it is being enacted. Using Heidegger’s interpretation as a guide, I show that Aristotle’s rejection of the Megarian position leads him to propose (...) that presence cannot be confined to activity. I also argue that this provides the context for Aristotle to realize that the relation between capacity and activity can be generalized as the relation between two ways of being. (shrink)

IT IS well-known that Plato and Aristotle disagree on the possibility of knowledge of nature. Plato maintains that knowledge, in contrast with belief, is never mistaken, that the objects of knowledge are always the same and never becoming, and that what we sense is always becoming. He concludes that knowledge is possible only of objects that are unchanging and separate from sensibles, i.e., the forms. Aristotle rejects this conclusion and recognizes knowledge of sensibles. Surprisingly, though, he accepts Plato's assumptions. He (...) too maintains that knowledge is not sometimes true and sometimes false, but always true ; he distinguishes the sensibles from the unchanging eternal beings ; and he asserts that the objects of knowledge "always are or are for the most part", and occasionally he even claims that they cannot be otherwise. The problem is, how can Aristotle accept Plato's assumptions about the nature and objects of knowledge and still maintain that knowledge of nature is possible? (shrink)

There is evidence in the early Vorlesungen to suggest that in Sein und Zeit Heidegger’s description of Dasein as Bewegung/Bewegtheit relies on his reading of Aristotle’s definition of motion, given specifically in the 1924 Grundbegriffe der aristotelischen Philosophie. According to Heidegger, Aristotle identifies kinêsis with energeia and calls it ‘active potentiality’ (tätige Möglichkeit). In this essay, I show how Heidegger’s interpretation of Aristotle’s definition of motion sheds light on the arguments concerning being-towards-death (Sein zum Tode) in Sein und Zeit. I (...) argue that self-understanding is Dasein’s active potentiality, since this is its authentic being-towards-death. In turn, I assess Heidegger’s philological and philosophical justifications for collapsing the distinction between energeia and kinêsis in Aristotle, showing how Heidegger diverges from Aristotle’s doctrines. (shrink)