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 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.

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.

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

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.

Aristotle's account of place, in which he defined a thing's place as the inner surface of its nearest immobile container, was supported by the Latin Middle Ages, even 1600 years after his death, though it had not convinced many ancient Greek philosophers. The sixth century commentator Philoponus took a more common-sense view. For him, place was an immobile three-dimensional extension, whose essence did not preclude its being empty, even if for other reasons it had always to be filled with body. However, Philoponus reserved his own definition for an excursus, already translated in this series, The Corollary on Place. In the text translated here he wanted instead to explain Aristotle's view to elementary students. The recent conjecture that he wished to attract young fellow Christians away from the official pagan professor of philosophy in Alexandria has the merit of explaining why he expounds Aristotle here, rather than attacking him. But he still puts the students through their paces, for example when discussing Aristotle's claim that place cannot be a body, or two bodies would coincide. This volume contains an English translation of Philoponus' commentary, as well as a detailed introduction, extensive explanatory notes and a bibliography.

This is the only commentary on Aristotle's theological work, Metaphysics, Book 12, to survive from the first six centuries CE – the heyday of ancient Greek commentary on Aristotle. Though the Greek text itself is lost, a full English translation is presented here for the first time, based on Arabic versions of the Greek and a Hebrew version of the Arabic. In his commentary Themistius offers an extensive re-working of Aristotle, confirming that the first principle of the universe is indeed Aristotle's God as intellect, not the intelligibles thought by God. The identity of intellect with intelligibles had been omitted by Aristotle in Metaphysics 12, but is suggested in his Physics 3.3 and On the Soul 3, and later by Plotinus. Laid out here in an accessible translation and accompanied by extensive commentary notes, introduction and indexes, the work will be of interest for students and scholars of Neoplatonist philosophy, ancient metaphysics, and textual transmission.