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. The arguments contained in this study are painstakingly constructed, developed through close and careful analysis of the Irenaean texts and in conversation with a wealth of Irenaean scholarship. ... an important contribution to our understanding of Irenaeus' theology, as well as our understanding of early Christian pneumatology.