Mysticism is notoriously difficult to pin down. It may briefly be characterised as seeking ‘an immediate link with the Absolute’ (Winfried Corduan). This would apply both to Christian mystics and to some types of Eastern religion.
Christian mysticism ‘seeks to describe an experienced, direct, nonabstract, unmediated, loving knowledge of God, a knowing or seeing so direct as to be called union with God.’ (D.D. Martin, Evangelical Dictionary of Theology)
Notable Christian mystics have included ‘Gregory of Nyssa, Pseudo-Dionysius the Areopagite, John Ruysboreck, the anonymous author of The Cloud of Unknowing, Julian of Norwich, Therese of Lisieux, Thomas a Kempis, Teresa of Avila, St.…