When evaluating factors shaping the Australian home front during World War I, the impact of preaching is generally overlooked, though historians have identified it as one of the most influential sources of public speech. This paper examines preaching in Melbourne just before and during the war, as reported in the influential Melbourne Herald. It asks how preaching was affected by the outbreak of war, and explores its developments, its reporting and its impacts. It points to conclusions about the nature and place of religion in the life of the city, and the interplay of preaching and war that highlight gaps in our understanding of the interaction of religion and war in Australia at that time. It challenges notions about Australian secularity, the degree of sectarianism, and the place of religion in our understanding of the war in both Australia and the wider British world.