In a society which is publicly sceptical of Christianity and which often assumes that all 'God talk' is superstituous or merely subjective, this paper suggests how the basic grammar of Christian belief can make sense today, and how it can be mapped in relation to key issues like globalisation, responding to human suffering, and the crisis of communication within mixed-conviction societies. Unlike many of Ekklesia's research papers, it is not directly tackling public policy issues, but instead is an extended essay exploring (especially through the work of Nicholas Lash, and others) some fundamental questions about how Christian convictions are shaped and articulated in the public realm. This is important, because much of our work and commentary employs explicitly theological language - although usually at a more popular level. The paper seeks to show that the meaning of 'God' is widely misunderstood, both by believers and sceptics, and that Christian theology offers some distinctive and robust resources for coming to terms with the demands of daily life, politics, culture, economics and society - but not in the easy, prescriptive way that is usually supposed. It includes a brief historical look at how and why talk of God became meaningless for so many in Western culture - before moving on to show how Christian thought becomes intelligible and effective once more when it is embodied in relationships, passionate conversation, shared living and action for change, rather than in abstract metaphysical categories. The essay does not presuppose wide theological reading, but it is a fairly dense exploration of some foundational issues. [Updated July 2007]