Today, spirituality is a mega trend. In Christian Theology, its significance is widely acknowledged. The essays in this book deal with this phenomenon from different perspectives: First, the basic meaning of Christian Spirituality is examined. Then, the subject is highlighted from the angle of the Orthodox, Catholic, Protestant and Evangelical tradition. These various aspects open a fascinating horizon for mutual sharing. Then, a bridge toward our present time is spanned by an analysis of postmodern spirituality. This volume concludes with a reflection how various traditions can merge into a genuine ecumenical spirituality.