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.