The Seventeenth Century writer makes a distinction between ‘living in God’ and ‘letting God live in you.’ The former is what we would normally understand as the spirituality of discipline, prayer, study of Scripture, Church membership etc which characterizes much of Western Christianity. The second, which is the main focus of his work, is a path of paradox, ambiguity, spiritual ‘darkness’, where the believer trusts nakedly in the love of God without seeking to understand the why’s and wherefore’s. For this reason it comes across as remarkably modern and apposite for the kind of uncertain and morally ambiguous world in which we now live. Fr Billy’s excellent introductions to each chapter and his questions for reflection are pastorally penetrating and considerably add to the power of the book. It is a very uncomfortable book to read – but for all the right reasons.