This dictionary is the first attempt of a treaty completely organic main aims of Christian spirituality in its doctrinal content and its rich historical development. Its purpose is to inform and educate about issues of doctrine and spiritual life (even non-Christian), following a line of reporting and updating documentation. It has a mainly doctrinal, but also historical, psychological and pastoral. This edition is more than just a version, as it presents a marked increase in articles and bibliography from the original Italian. E. Ancilli was professor at the Pontifical Urban University, author of several books and articles and editor of the "Rivista di vita spirituale". The large group of partners consists of Italian and Spanish, all holders of higher degrees and mostly professors of ecclesiastical faculties and institutes.