Is Christianity a bland, domesticated religion, unthreatening and easy to grasp? Or is it the most exotic, unexpected, and uncanny of religious paths? For the mystics and saints - and for Robert Barron who discovered Christianity through them - it is surely the strangest way. 'At its very centre', writes Barron, 'is a God who comes after us with a reckless abandon, breaking open his own heart in love in order to include us in the rhythm of his own life'. What could be more compelling?