Some Christians and scholars who study religion claim that Christianity is dened by and as “belief in god”. No other religion is properly dened in terms of beliefs or believing. is means that either Christianity is the only religion, or it is not a religion at all. is is hardly a new thought but I put it more starkly here than I have seen it put before. It is a commonplace of the study of religion that belief and believing are not at the heart of religion (though they may be at the heart of Christianity). If so, belief and believing should not be permitted to direct our attention when we research and teach about religions. is chapter sets the scene for thinking again about what “religion” might mean by reecting on this recognition that believing is a denitive act for Christians but has been wrongly applied to dening religion itself.