Today's Christianity is all about doctrine – and the policing of it. That may be a mistake:
If you ask people in modern western societies whether they are religious, they tend to answer by telling you what they believe (or don't believe). When you examine religion as a universal human phenomenon, however, its connections with belief are far more tenuous.
The fixation on belief is most prominent in western Christianity, where it results mainly from the distorting influence of Greek philosophy. Continuing this obsession, modern atheists have created an evangelical cult of unbelief. Yet the core of most of the world's religions has always been holding to a way of life rather than subscribing to a list of doctrines. In Eastern Orthodoxy and some currents of Hinduism and Buddhism, there are highly developed traditions that deny that spiritual realities can be expressed in terms of beliefs at all. Though not often recognised, there are parallels between this sort of negative theology and a rigorous version of atheism.