A close study of aspects of Irenaeus' pneumatology that demonstrates how Irenaeus combined Second Temple Jewish traditions of the spirit with New Testament theology to produce the most complex Jewish-Christian pneumatology of the early church.

Irenaeus' theology of the Holy Spirit is often highly regarded amongst theologians today, but that regard is not universal, nor has an adequate volume of literature supported it. This study provides a detailed examination of certain principal, often distinctive, aspects of Irenaeus' pneumatology. In contrast to those who have suggested Irenaeus held a weak conception of the person and work of the Holy Spirit, Anthony Briggman demonstrates that Irenaeus combined Second Temple Jewishtraditions of the spirit with New Testament theology to produce the most complex Jewish-Christian pneumatology of the early church. In so doing, Irenaeus moved beyond his contemporaries by being the first author, following the New Testament writings, to construct a theological account in whichbinitarian logic did not diminish either the identity or activity of the Holy Spirit. That is to say, he was the first to support his Trinitarian convictions by means of Trinitarian logic. Briggman advances the narrative that locates early Christian pneumatologies in the context of Jewish traditions regarding the spirit. In particular, he argues that the appropriation and repudiation of Second Temple Jewish forms of thought explain three moments in the development of Christian theology. First, the existence of a rudimentary pneumatology correlating to the earliest stage of Trinitarian theology in which a Trinitarian confession is accompanied by binitarian orientation/logic, suchas in the thought of Justin Martyr. Second, the development of a sophisticated pneumatology correlating to a mature second century Trinitarian theology in which a Trinitarian confession is accompanied by Trinitarian logic. This second moment is visible in Irenaeus' thought, which eschewed Jewishtraditions that often hindered theological accounts of his near contemporaries, such as Justin, while adopting and adapting Jewish traditions that enabled him to strengthen and clarify his own understanding of the Holy Spirit. Third, the return to a rudimentary account of the Spirit at the turn of the third century when theologians such as Tertullian, Origen, and Novatian repudiated Jewish traditions integral to Irenaeus' account of the Holy Spirit.

Eric Osborn's book presents a major study of Irenaeus (125–200), bishop of Lyons, who attacked Gnostic theosophy with positive ideas as well as negative critiques. Irenaeus's combination of argument and imagery, logic and aesthetic, was directed to the bible. Dominated by a Socratic love of truth and a classical love of beauty, he was a founder of Western humanism. Erasmus, who edited the first printed edition of Irenaeus, praised him for his freshness and vigour. He is today valued for his splendid aphorisms, his optimism, love of the created world, evolutionary view of history, theology of beauty and humour. Why have two millennia of European culture been so creative? Irenaeus points to Greek ways of thinking and the Christian Bible. Irenaeus's thought is complex, yet rewarding to the critical reader, and this full study of it will be of interest to theologians, historians of ideas, classicists, scientists and students.

During the second century the Christian world was shaken by the Gnostics. Irenaeus came from Asia Minor via Rome to become bishop of Lyons, clarify Christian doctrines and fight the Gnostics with a major, five-volume work. He was a living part of his contemporary culture and his approach filled early Christian thought with new life. The writings of Irenaeus exist as a whole only in Latin and Armenian. This study offers new translations of significant parts of his work, critically based on a complete reconstruction of the original Greek in the French series Sources Chretiennes. This collection of sources will also be an invaluable resource for students of the Early Church.

In Irenaeus on the Trinity, Jackson Lashier provides a fresh reading of Irenaeus' understanding of God, in dialogue with his opponents and sources, which reveals a more developed Trinitarian theology than traditionally thought. Key Trinitarian themes that emerge are the Fatherhood of God, the mutual indwelling relations of Father, Son, and Spirit, and the cooperative divine work of all three in the economy. The study finds Irenaeus' thought to depart in these areas from standard second century trajectories--Apologists and Gnostics--moving Trinitarian theology in the direction of more developed Trinitarian thought of later centuries. This monograph offers not only a better understanding of Irenaeus' thought, but also a fuller picture of the development of Trinitarian thought in early Christianity.

For too long certain scholars have been content to portray Irenaeus of Lyons as a well-meaning churchman but incompetent theologian. By offering a careful reading of Irenaeus' polemical and constructive arguments, God and Christ in Irenaeus contradicts these claims by showing that he was highly educated, trained in the rhetorical arts, aware of general philosophical positions, and able to use both rhetorical and philosophical theories and methods in his argumentation. Moreover, the theological account laid down by his pen was original and sophisticated, supremely so for one of the second century. In contrast to readings that minimize the metaphysical dimension of Irenaeus' theology, Anthony Briggman establishes as pillars of Irenaeus' polemical argumentation and constructive theology his conception of the divine being as infinite and simple, the reciprocal immanence of the Word-Son and God the Father, divine generation, the union of the divine Word-Son and human nature in the person of Christ, and the revelatory activity of the infinite and incomprehensible Word-Son, amongst other features of his theology. Briggman offers a fundamentally new understanding of Irenaeus and his thought.