This book is the first full-length study of Evagrian apatheia and the most detailed examination to date of Evagrian anthropology. It situates them in their overall context of cosmology, salvation history, and the spiritual life. It describes a system which, while profoundly christocentric and deriving its structure from Paul, is a masterpiece of late antique philosophical synthesis incorporating elements of Platonic, Aristotelian, Stoic, and medical thought. It will be of interest to specialists in classical and late antique philosophy, to historians of philosophy, theology, spirituality, psychology, psychiatry, and medicine, to scholars of monasticism, and to theologians and philosophers interested in the human person.