"Kalligas's commentaries are a major event in the study of Plotinus. Kalligas is sensitive to the demands of exegesis, philology, and history, but also to the more subtle and challenging demands of philosophical analysis. His commentary displays extraordinary mastery of the full text of the Enneads and a sophisticated appreciation of the relevant contexts--from Plato, Aristotle, and Stoicism to skepticism, Middle Platonism, and the entire tradition of Neoplatonism."--Alexander P. D. Mourelatos, University of Texas, Austin