Prof. Peter Tyler is Professor of Pastoral Theology and Spirituality at St Mary’s University, Twickenham. He is also a spiritual director and registered psychotherapist. His recent publications include The Pursuit of the Soul: Psychoanalysis, Soul-Making and the Christian Tradition (T & T Clark, 2016), Teresa of Avila: Doctor of the Soul (Bloomsbury 2013), The Bloomsbury Guide to Christian Spirituality (Bloomsbury 2012, co-edited with Richard Woods) and The Return to the Mystical: Ludwig Wittgenstein, Teresa of Avila and the Christian Mystical Tradition (Continuum 2011). He has contributed much to the ongoing debate between psychology and spirituality and is Co-Editor of Vinayasadhana, a new journal for Psycho-Spiritual formation. Dr Edward Howells is Senior Lecturer in Christian Spirituality at Heythrop College, University of London. Publications include John of the Cross and Teresa of Avila: Mystical Knowing and Selfhood (Crossroad 2002); Sources of Transformation: Revitilising Christian Spirituality (Continuum 2010, co-edited with Peter Tyler); and various journal articles and book chapters on Christian spirituality and mystical theology. He is currently working on the Oxford Handbook of Mystical Theology, co-edited with Mark McIntosh (Oxford, forthcoming 2017).