Bøger af John Philoponus

The ancient Greek commentators on Aristotle constitute a large body of Greek philosophical writings, not previously translated into European languages. This volume includes notes and indexes and forms part of a series to fill this gap.

This volume translates the earlier part of the commentary by Philoponus on Aristotle's "On the Soul".

Book 3 of Aristotle''s Physics primarily concerns two important concepts for his theory of nature: change and infinity. Change is important because, in Book 2, he has defined nature - the subject-matter of the Physics - as an internal source of change. Much of his discussion is dedicated to showing that the change occurs in the patient which undergoes it, not in the agent which causes it. Thus Book 3 is an important step in clearing the way for Book 8''s claims for a divine mover who causes change but in whom no change occurs. The second half of Book 3 introduces Aristotle''s doctrine of infinity as something which is always potential, never actual, never traversed and never multiplied. Here, as elsewhere, Philoponus the Christian turns Aristotle''s own infinity arguments against the pagan Neoplatonist belief in a beginningless universe. Such a universe, Philoponus replies, would involve actual infinity of past years already traversed, and a multiple number of past days. The commentary also contains intimations of the doctrine of impetus - which has been regarded, in its medieval context, as a scientific revolution - as well as striking examples of Philoponus'' use of thought experiments to establish philosophical and broadly scientific conclusions.

Paul Lettinck has restored a lost text of Philoponus by translating it for the first time from Arabic (only limited fragments have survived in the original Greek). The text, recovered from annotations in an Arabic translation of Aristotle, is an abridging paraphrase of Philoponus'' commentary on Physics Books 5-7, with two final comments on Book 8. The Simplicius text, which consists of his comments on Aristotle''s treatment of the void in chapters 6-9 of Book 4 of the Physics, comes from Simplicius'' huge commentary on Book 4. Simplicius'' comments on Aristotle''s treatment of place and time have been translated by J. O. Urmson in two earlier volumes of this series.

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 world contains only finite power. Simplicius' presentation of Philoponus' arguments (which may well be tendentious), together with his replies, tell us a good deal about both Philosophers.

Philoponus was a brilliant Christian philosopher who turned the ideas of the pagans of the Neoplatonist school against them. Here, he attacks the most devout pagan philosopher, Proclus, defending the Christian view that the universe had a beginning against Proclus' arguments to the contrary.

In 'On The Soul' 2.1-6, Aristotle gives a very different account of the soul from Plato's by tying the soul to the body. He defines soul and life by reference to the capacities for using food to maintain structure and reproduce, for perceiving and desiring. Philoponus gives a 'cognitive' view.

Book 2 of the Physics is arguably the best introduction to Aristotle's work, both because it explains some of his central concepts, such as nature and the four causes, and because it asks some gripping questions that are still debated today: Is chance something real? If so, what? Can nature be explained by chance, necessity and natural selection, or is it purposive?Philoponus' commentary is not only a valuable guide, but also a work of Neoplatonism with its own views on causation, the Providence of Nature, the problem of evil and the immortality of the soul.

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, not physical. Neither light nor the action of colour involves the travel of bodies. Our capacities for psychological activity do not follow, nor result from, the chemistry of our bodies, but merely supervene on that. On the other hand, Philoponus shows knowledge of the sensory nerves, and he believes that thought and anger both warm us. This argument is used elsewhere to show how we can tell someone else''s state of mind.

Philoponus was a brilliant Christian philosopher, steeped in Neoplatanism, who turned the pagans' ideas against them. Here he attacks the devout Athenian pagan philosopher, Proclus, defending the Christian view that the universe had a beginning against Proclus' arguments to the contrary.

This series translates the 15,000 pages of philosophical writings by the ancient Greek commentators on Aristotle, written mainly between 200 and 600 AD. Now translated into English, these works include introductions, notes and comprehensive indexes, filling a gap in the history of European thought.