This is a compact introduction to the work of Philo (c. 20 BCE-50 CE), the important Jewish thinker and scriptural interpreter. Kenneth Schenck provides a guide for understanding Philo's complex works, a roadmap for topics and contents of Philo's writings, and a description of contemporary research so students can easily find their ways into Philo study.

How did Origen, one of the major Patristic thinkers, construct his philosophical theology? What are his main innovations in metaphysics, protology, Trinitarian Theology and Christology? How did he view the relation between philosophy and theology? This is a collection of over twenty essays, mostly from world-leading journals and books from outstanding publishers, besides two new ones, from Professor Ilaria L.E. Ramelli’s life-long, and always continuing, research on Origen. This coherent set of studies is grouped around Origen’s metaphysics, protology, Trinitarian theology and Christology, and the relation between theology and philosophy, with reception aspects. The essays address Origen’s towering figure in Patristic philosophy, Christian Platonism, and the Platonic tradition, facets of his reception of Platonism, reflections concerning the Christianization of Hellenism (vs. the Hellenization of Christianity) and the relation between philosophy and theology and between ‘pagan’ and Christian Platonism; Origen’s philosophical theology and connections to Platonism; the question of Origen's conversion and his lexicon of epistrophē; a comparison between the imperial Platonist Atticus’ and Origen’s theories on the soul of God the Creator; Alexander of Aphrodisias as a source of Origen’s philosophy and the birth of the eternity formula in reference to the Son; the problem of Origen’s "subordinationism", which must be nuanced; Origen’s major contribution to Trinitarian theology in the notion of hypostasis and its foundation in Scripture and philosophy; the reciprocal indwelling of the Father in the Son and its implications against Origen’s "subordinationism"; Origen’s influence on Augustine as paradoxical and a Christological case study; the divine as inaccessible object of knowledge in ancient and Patristic Platonism; the reception of Origen’s ideas in the West; the notion of divine power in Origen: sources and aftermath; Platonist exemplarism in Origen and Plotinus; Paul’s notion of nous in Origen and Evagrius; the reception of Origen in Ps.Dionysius, and Origen’s heritage in the concept of matter in the Dialogue of Adamantius. The volume is rounded off by theoretical reflections on philosophy of religion and philosophical theology. This book is very relevant to the study of Origen, the foundations of Christian thought, and ancient and late antique philosophy, theology and culture.

This interrogation of Origen's legacy for the 21st Century returns to old questions built upon each other over eighteen centuries of Origen scholarship-problems of translation and transmission, positioning Origen in the histories of philosophy, theology, and orthodoxy, and defining his philological and exegetical programmes. The essays probe the more reliable sources for Origen's thought by those who received his legacy and built on it. They focus on understanding how Origen's legacy was adopted, transformed and transmitted looking at key figures from the fourth century through the Reformation. A section on modern contributions to the understanding of Origen embraces the foundational contributions of Huet, the twentieth century movement to rehabilitate Origen from his status as a heterodox teacher, and finally, the identification in 2012 of twenty-nine anonymous homilies on the Psalms in a codex in Munich as homilies of Origen. Equally important has been the investigation of Origen's historical, cultural, and intellectual context. These studies track the processes of appropriation, assimilation and transformation in the formation and transmission of Origen's legacy. Origen worked at interpreting Scripture throughout his life. There are essays addressing general issues of hermeneutics and his treatment of groups of books from the Biblical canon in commentaries and homilies. Key points of his theology are also addressed in essays that give attention to the fluid environment in which Origen developed his theology. These essays open important paths for students of Origen in the 21st century.

Origen’s On First Principles is a foundational work in the development of Christian thought and doctrine: it is the first attempt in history at a systematic Christian theology. For over a decade it has been out of print with only expensive used copies available; now it is available at an affordable price and in a more accessible format. On First Principles is the most important surviving text written by third-century Church father, Origen. Origen wrote in a time when fundamental doctrines had not yet been fully articulated by the Church, and contributed to the very formation of Christianity. Readers see Origen grappling with the mysteries of salvation and brainstorming how they can be understood. This edition presents G. W. Butterworth’s trusted translation in a new, more readable format, retains the introduction by Henri de Lubac, and includes a new foreword by John C. Cavadini. As St. Gregory of Nazianzus, Doctor of the Church, wrote: “Origen is the stone on which all of us were sharpened.”