At least since the Neoplatonic commentators, Aristotle’s thesis that place is immobile has been considered a serious problem for his theory of place and locomotion. This diagnosis, however, is essentially based on a single passage (212a14–21)—the famous passage on the boat moving in a river—which interpreters find both central and obscure or imprecise, and which has so far resisted a literal reading. I tackle this issue by considering texts hitherto neglected by scholars and propose a new and charitable interpretation, showing (...) the consistency of Aristotle’s thesis of the immobility of place with his general theory of change, as well as a fresh reading of ll. 212a14–21 that stays close to the text. Further, I argue that there are good reasons to believe that the interpretation I put forward is the most ancient one. (shrink)

This dissertation offers a new and comprehensive analysis of Abū Naṣr al-Fārābī's cosmology by focusing on various important issues that have been largely neglected by the modern scholarship. It provides an examination of the physical, metaphysical, and astronomical aspects of al-Fārābī's cosmology by adopting a multidisciplinary approach that takes into account the history of philosophy and the history of astronomy. Accordingly, my dissertation explores how al-Fārābī attempted to reconcile features of Ptolemaic astronomy with Aristotelian and Neoplatonic theories, an endeavor which (...) resulted in the formulation of innovative cosmological ideas. Chapters I and II provide background information on al-Fārābī's activity as a commentator and his relation to the Greek commentatorial tradition and assess the relevant primary sources. In addition, they examine al-Fārābī's approach to cosmology and his scientific method in terms of both the Ptolemaic astronomical tradition and the Aristotelian corpus. Chapter III addresses problems related to the structure of al-Fārābī's cosmology, especially the origin of his ennadic cosmological model and his spherology. Particular attention is devoted to the question of how Aristotle's unmoved movers and Ptolemy's astronomical theories are reconciled. Chapters IV, V, and VI analyze the place of celestial matter, intellect, and motion respectively in al-Fārābī's cosmology and attempt to redefine the second teacher's relation to the various trends of Greek philosophy. The study stresses al-Fārābī's connection with the Neoplatonic and Peripatetic currents, particularly with thinkers such as Alexander of Aphrod. (shrink)