This is the first English translation of Proclus' commentary on Plato's Parmenides. Glenn Morrow's death occurred while he was less than halfway through the translation, which was completed by John Dillon. A major work of the great Neoplatonist philosopher, the commentary is an intellectual tour de force that greatly influenced later medieval and Renaissance thought. As the notes and introductory summaries explain, it comprises a full account of Proclus' own metaphysical system, disguised, as is so much Neoplatonic philosophy, in the form of a commentary.

Of Proclus’ immense philosophical system, the part concerning the natural world may well be the most fascinating. Traditional scholarship tends to downplay that part of Neoplatonism, in favour of idealism, but recently this attitude is changing. This study contributes to that development by showing how Proclus’ natural philosophy relates to theology, while remaining a science in its own right. Starting from his Commentary on Plato’s Timaeus, it presents a revision of Proclus’ metaphysics of nature and provides new insight into his surprisingly peripatetic philosophy of science, the role of mathematics, and the nature of discourse in natural philosophy. This book will be of interest both to students of the Platonic tradition, and to historians of natural science, metaphysics and epistemology.

This books delves into the major tenets of Syrianus' philosophical teachings on the Timaeus and Parmenides based on the testimonia of Proclus, as found in Proclus' commentaries on Plato's Timaeus and Parmenides, and Damascius, as reported in his On First Principles and commentary on Plato's Parmenides.