There are special times of movement in the history of ideas, and one such time - as the author of this study shows - was the second half of the second century, when Christian thought showed fresh vigour. By concentrating on five seminal Christian thinkers of the second century (Justin, Athenegoras, Irenaeus, Clement of Alexandria, and Tertullian), Eric Osborn illustrates how it was that Christianity made monotheism axiomatic to its central doctrinal claims while adapting, too, to the peculiar circumstances in which it developed. The stimulus for new thought came from the objections of the state, philosophers, Jews, Gnostics, and Marcion, who in different ways denied the Christian claim to faith in one God. In response, Christian thinkers argued for one God who was the first principle of being, goodness, and truth. In its presentation of the lively beginning which brought Christianity and classical thought together, this book casts light on the growth of the European intellectual tradition.

The problems which Christians faced in the second-century world, with its variety of religious beliefs, have a close relation to those which confront them today. The new religion was presented with a range of external threats and criticism which evoked a vigourous, fundamental and imaginative response. The arguments of this most creative period of Christian thought were of a more general and philosophical kind than the discussions of dogmatic issues in the fourth and fifth centuries, and are properly regarded as the beginning of Christian philosophy, though this does not of course imply the emergence of a 'system' or a uniformly philosophical level of writing. Professor Osborn's method in this book, derived from analytic philosophy, is to elucidate specific questions which occupied four major writers from different centres of early Christianity: Justin, Irenaeus, Tertullian and Clement of Alexandria. Is there one God and can one speak of him? Is man free and has he any link with God? Why has a good God made a world in which evil is so evident? Has history a meaning? Who is Jesus Christ?

In so-called Christian countries an increasing number of people openly reject Christian morality. It is a commonplace that they do this for values that can be shown to be Christian. How did this state of affairs come about? An examination of the beginning of Christian ethical thought shows that, within great personal variety, certain patterns or concepts remain constant. Righteousness, discipleship, faith and love are traced in this book from the New Testament through to Augustine. There is a necessary tension between high ideals and practical performance, or between perfection and contingency. When this tension is lost, Christian ethics can easily go wrong. The amoral perfectionism of second-century Gnostics is remarkably similar to the mysticism of communal movements; the opposite threat of legalism has always been present in conservative forms of Christianity. Dr Osborn is concerned to explain rather than to defend, to look at the way conclusions are reached, and to show the rich diversity of early Christian thought. Successive chapters deal with the New Testament, Clement of Alexandria, Basil the Great, John Chrysostom and Augustine.

Clement of Alexandria (150-215) lived and taught in the most lively intellectual centre of his day. This book offers a comprehensive account of how he joined the ideas of the New Testament to those of Plato and other classical thinkers. Clement taught that God was active from the beginning to the end of human history and that a Christian life should move on from simple faith to knowledge and love. He argued that a sequence of three elliptical relations governed the universe: Father and Son, God and humanity, humans and their neighbours. Faith as a fixed conviction which is also a growing mustard seed was joined to Plato's unwavering search for the best reason. The open heaven of prophecy became intelligible through Plato's ascending dialectic. This book will be invaluable in making this outstanding thinker of the early Church accessible to the students of today.

Clement of Alexandria (150-215) lived and taught in the most lively intellectual centre of his day. This book offers a comprehensive account of how he joined the ideas of the New Testament to those of Plato and other classical thinkers. Clement taught that God was active from the beginning to the end of human history and that a Christian life should move on from simple faith to knowledge and love. He argued that a sequence of three elliptical relations governed the universe: Father and Son, God and humanity, humans and their neighbours. Faith as a fixed conviction which is also a growing mustard seed was joined to Plato's unwavering search for the best reason. The open heaven of prophecy became intelligible through Plato's ascending dialectic. This book will be invaluable in making this outstanding thinker of the early Church accessible to the students of today.

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.

Tertullian was the first western Christian to write theology, defending Christians against the hostility of the Roman state, as well as arguing against Marcion, Praxeas and theosophical fantasy. A complex thinker, Tertullian has, in the modern era, been rejected by both liberal Christianity and its secular critics. But his ideas have become more accessible in our century, which has seen the destruction of Enlightenment beliefs that reason should lead to a quasi-mathematical system. The work of Goedel, Wittgenstein, Rorty and so many others has opened up the way for an understanding of Tertullian's passion for opposites, contingency and rational argument. For a long time misquoted and misused, Tertullian now calls for sustained analysis and interpretation. This book offers a major reappraisal of his theology and its influence on the shape of the western Christian tradition.

There are special times of movement in the history of ideas, and one such time - as the author of this study shows - was the second half of the second century, when Christian thought showed fresh vigour. By concentrating on five seminal Christian thinkers of the second century (Justin, Athenegoras, Irenaeus, Clement of Alexandria, and Tertullian), Eric Osborn illustrates how it was that Christianity made monotheism axiomatic to its central doctrinal claims while adapting, too, to the peculiar circumstances in which it developed. The stimulus for new thought came from the objections of the state, philosophers, Jews, Gnostics, and Marcion, who in different ways denied the Christian claim to faith in one God. In response, Christian thinkers argued for one God who was the first principle of being, goodness, and truth. In its presentation of the lively beginning which brought Christianity and classical thought together, this book casts light on the growth of the European intellectual tradition.

Tertullian was the first Western Christian to write theology, defending Christians against the hostility of the Roman state, as well as arguing against Marcion, Praxeas and theosophical fantasy. A complex thinker, Tertullian has, in the modern era, been rejected by both liberal Christianity and its secular critics. For a long time misquoted and misused, he now calls for sustained analysis and interpretation. This book offers a major reappraisal of his theology and its influence on the shape of the Western Christian tradition.

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 a new document, the Christian bible. Dominated by a Socratic love of truth and a classical love of beauty, he was a founder of Western humanism. Irenaeus is renowned for his aphorisms, optimism, love of the created world, evolutionary view of history, and theology of beauty and humor.