Themistius' treatment of Books 5-8 of Aristotle's Physics shows this commentator's capacity to identify, isolate and discuss the core ideas in Aristotle's account of change, his theory of the continuum, and his doctrine of the unmoved mover. His paraphrase offered his ancient students, as they will now offer his modern readers, an opportunity to encounter central features of Aristotle's physical theory, synthesized and epitomized in a manner that has always marked Aristotelian exegesis but was raised to a new level by the innovative method of paraphrase pioneered by Themistius. Taking selective but telling accounts of the earlier Peripatetic tradition (notably Theophrastus and Alexander of Aphrodisias), this commentator creates a framework that can still be profitably used by Aristotelian scholars today.

Paul Lettnick (Semitic languages, Free U., Amsterdam) has reconstructed Philoponus' commentary on Aristotle by translating it from annotations to an Arabic translation of the Physics itself; only fragments of the commentary are extant. J.O. Urmson (philosophy, Stanford U.) translates the commentary by Simplicius on Aristotle's view of the void. The two were rival neoplatonists writing in Greek in the sixth century. Annotation copyright by Book News, Inc., Portland, OR

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In this commentary on Aristotle Physics book eight, chapters one to five, the sixth-century philosopher Simplicius quotes and explains important fragments of the Presocratic philosophers, provides the fragments of his Christian opponent Philoponus' Against Aristotle On the Eternity of the World, and makes extensive use of the lost commentary of Aristotle's leading defender, Alexander of Aphrodisias. This volume contains an English translation of Simplicius' important commentary, as well as a detailed introduction, explanatory notes and a bibliography.

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.

This book provides a comprehensive and in-depth study of Physics I, the first book of Aristotle's foundational treatise on natural philosophy. While the text has inspired a rich scholarly literature, this is the first volume devoted solely to it to have been published for many years, and it includes a new translation of the Greek text. Book I introduces Aristotle's approach to topics such as matter and form, and discusses the fundamental problems of the study of natural science, examining the theories of previous thinkers including Parmenides. Leading experts provide fresh interpretations of key passages and raise new problems. The volume will appeal to scholars and students of ancient philosophy as well as to specialists working in the fields of philosophy and the history of science.