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The Posterior Analytics contains Aristotle's Philosophy of Science. In Book 2, Aristotle asks how the scientist discovers what sort of loss of light constitutes lunar eclipse. The scientist has to discover that the moon's darkening is due to the earth's shadow. Once that defining explanation is known the scientist possesses the full scientific concept of lunar eclipse and can use it to explain other necessary features of the phenomenon. The present commentary, arguably misascribed to Philoponus, offers some interpretations of Aristotle that are unfamiliar nowadays. For example, the...

In one of the most original books of late antiquity, Philoponus argues for the Christian view that matter can be created by God out of nothing. It needs no prior matter for its creation. At the same time, Philoponus transforms Aristotle's conception of prime matter as an incorporeal 'something - I know not what' that serves as the ultimate subject for receiving extension and qualities. On the contrary, says Philoponus, the ultimate subject is extension. It is three-dimensional extension with its exact dimensions and any qualities unspecified. Moreover, such extension is the defining...

In one of the most original books of late antiquity, Philoponus argues for the Christian view that matter can be created by God out of nothing. It needs no prior matter for its creation. At the same time, Philoponus transforms Aristotle's conception of prime matter as an incorporeal 'something - I know not what' that serves as the ultimate subject for receiving extension and qualities. On the contrary, says Philoponus, the ultimate subject is extension. It is three-dimensional extension with its exact dimensions and any qualities unspecified. Moreover, such extension is the defining...

In the chapters discussed in this section of Philoponus' Physics commentary, Aristotle explores a range of questions about the basic structure of reality, the nature of prime matter, the principles of change, the relation between form and matter, and the issue of whether things can come into being out of nothing, and if so, in what sense that is true. Philoponus' commentaries do not merely report and explain Aristotle and the other thinkers whom Aristotle is discussing. They are also the philosophical work of an independent thinker in the Neoplatonic tradition. Philoponus has his...

Aristotle's Posterior Analytics elaborates for the first time in the history of Western philosophy the notions of science and the requirements for the distinctive kind of knowledge scientists possess. His model is mathematics and his treatment of science amounts to a philosophical discussion, from the perspective of Aristotelian syllogistic, of mathematical proofs and the principles they are based on. Chapters 1-8 expound the foundations of Aristotle's theory, pointing out the similarities and differences between scientific knowledge and other types of knowledge, establishing the...

Until the launch of this series over ten years ago, the 15,000 volumes of the ancient Greek commentators on Aristotle, written mainly between 200 and 600 AD, constituted the largest corpus of extant Greek philosophical writings not translated into English or other European languages. Subjects covered in this, the third and last, volume of translation of this work include: why the elements are four in number; what's wrong with Empedocles' theory of elements; how homogeneous stuffs, particularly the tissues of a living body, come to be and consist of the elements. The volume also contains...

This text by Philoponus, the sixth-century commentator on Aristotle, is notable for its 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...

In On The Soul 2.1-6, Aristotle differs from Plato in his account of the soul, by tying it to the body. The soul is the life-manifesting capacities that we all have and that distinguish living things, and explain their behaviour. He defines soul and life by reference to the capacities for using food to maintain structure and reproduce, for perceiving and desiring, and for rational thought. Capacities have to be defined by reference to the objects to which they are directed. The five senses, for example, are defined by reference to their objects which are primarily forms like colour....

In this, one of the most original ancient texts on sense perception, Philoponus, the sixth century AD commentator on Aristotle, considers how far perceptual processes are incorporeal. Colour affects us in the same way as light which, passing through a stained glass window, affects the air, but colours only the masonry beyond. Sounds and smells are somewhat more physical, travelling most of the way to us with a moving block of air, but not quite all the way. Only the organ of touch takes on the tangible qualities perceived, because reception of sensible qualities in perception is cognitive,...

This is a post-Aristotelian Greek philosophical text, written at a crucial moment in the defeat of paganism by Christianity, AD 529, when the Emperor Justinian closed the pagan Neoplatonist school in Athens. Philoponus in Alexandria was a brilliant Christian philosopher, steeped in Neoplatanism, who turned the pagans' ideas against them. Here he attacks the most devout of the earlier Athenian pagan philosophers, Proclus, defending the distinctively Christian view that the universe had a beginning against Proclus' eighteen arguments to the contrary, which are discussed in eighteen chapters....

Der Traktatdes alexandrinischen Gelehrten Johannes Philoponos uber das Astrolab enthalt die alteste erhaltene Beschreibung des spater besonders im Mittelalter weit verbreiteten planispharischen Gerates. Stuckelbergers Ausgabe richtet sich nicht nur an Philologen, sondern auch an Historiker und Astronomen; dem neu redigierten griechischen Text sind eine deutsche Ubersetzung, Erlauterungen und Illustrationen beigegeben.

This is one of the most interesting of all post-Aristotelian Greek philosophical texts, written at a crucial moment in the defeat of paganism by Christianity, AD 529, when the Emperor Justinian closed the pagan Neoplatonist school in Athens. Philoponus in Alexandria was a brilliant Christian philosopher, steeped in Neoplatonism, who turned the pagans' ideas against them. Here he attacks the most devout of the earlier Athenian pagan philosophers, Proclus, defending the distinctively Christian view that the universe had a beginning against Proclus' eighteen arguments to the contrary, which...

In the Corollaries on Place and Void, Philoponus attacks Aristotle's conception of place as two-dimensional, adopting instead the view more familiar to us that it is three-dimensional, inert and conceivable as void. Philoponus' denial that velocity in the void would be infinite anticipated Galileo, as did his denial that speed of fall is proportionate to weight, which Galileo greatly developed.

In the second document Simplicius attacks a lost treatise of Philoponus which argued for the Christians against the eternity of the world. He exploits Aristotle's concession that the...