This work, which establishes Irenaeus as the most important of the theologians of the second century, is a detailed and effective refutation of Gnosticism, and

"Against Heresies - Book IV" from Irenaeus. Bishop of Lugdunum in Gaul (-202A.D.).

St Irenaeus is the most important theologian of the second century, laying the foundation for all future Christian thinkers. Irenaeus tells us that he had known

A translation and analysis of the third book of St. Irenaeus' influential work 'Against Heresies'. This book offers a detailed critique of Gnostic teachings and