Gregory of Nyssa (c.330-395) made important contributions to both theological thought and the understanding of the spiritual life. He was especially significant in adapting the thought of Origen to fourth century orthodoxy. The early treatise on the inscriptions of the Psalms shows the early stages of the development of Gregory's thought. This book presents the first translation of the treatise in a modern language. The annotations show Gregory's indebtedness to the thought of classical antiquity as well as to the Bible. The Introduction sets forth the structure of Gregory's treatise, and places it in the context of earlier Christian commentaries on the Psalms. It shows how his hermeneutical approach was influenced by both Iamblichus the Neo-Platonist and Origen. Finally, Dr Heine compares Gregory's understanding of the stages of the spiritual life in the treatise with that in his later and more widely known writings on the life of Moses and the Song of Songs.