This is the first volume of a groundbreaking commentary on one of the most important works of ancient philosophy, the Enneads of Plotinus--a text that formed the basis of Neoplatonism and had a deep influence on early Christian thought and medieval and Renaissance philosophy. This volume covers the first three of the six Enneads , as well as Porphyry's Life of Plotinus , a document in which Plotinus's student--the collector and arranger of the Enneads --introduces the philosopher and his work. A landmark contribution to modern Plotinus scholarship, Paul Kalligas's commentary is the most detailed and extensive ever written for the whole of the Enneads . For each of the treatises in the first three Enneads , Kalligas provides a brief introduction that presents the philosophical background against which Plotinus's contribution can be assessed; a synopsis giving the main lines and the articulation of the argument; and a running commentary placing Plotinus's thought in its intellectual context and making evident the systematic association of its various parts with each other.