Celebrated for almost five centuries as a master of spiritual literature, St. Teresa of Avila is one of the most beloved religious figures in history. Overcome one day by a mystical vision of a crystal castle with seven chambers, each representing a different stage in the soul's spiritual quest for union with God, Teresa recorded her vision in this now classic text. Probably her most important and widely studied work, The Interior Castle guides the spiritual seeker through each chamber of the castle to the center and the soul's final union with the divine. Free of religious dogma, this contemporary rendering is a beautiful and practical set of teachings for seekers of all faiths in need of guidance. Mirabai Starr's introduction places this classic in a contemporary context, reasserting its spiritual and literary importance close to five hundred years after it was first published.