Nowadays, by contrast, Christianity specialises in soft-focus mood music; its threats of hell, its demand for poverty and chastity, its doctrine that only the few will be saved and the many damned, have been shed, replaced by strummed guitars and saccharine smiles. It has reinvented itself so often, and with such breathtaking hypocrisy, in the interests of retaining its hold on the gullible, that a medieval monk who woke today, like Woody Allen's Sleeper, would not be able to recognise the faith that bears the same name as his own.