By now most of us are familiar with the prophecy made by the eminent theologian, Karl Rahner: “The Christian of the future will be a mystic or will not exist at all.” It was a wise prediction to make over forty years ago, one that continues to be a stimulus for reflection, discussion and indeed inspiration. The truth is all Christians are called to be mystics. A mystic is an adult Christian or, to put it another way, a mystic is a mature Christian.