The Society for the Study of Christian Spirituality (USA) and the Forum of Professors of Spiritual Theology in Italy gathered scholars of Christian Spirituality Studies and Spiritual Theology for an international conference entitled 'The Study of Christian Spirituality and Spiritual Theology: Evolving Methodologies' at the Pontifical University Antonianum in Rome from the 25th to the 28th of September, 2019. Scholars from both fields were encouraged to present approaches, techniques, and developments to either or both fields of study as well as emerging theological, hermeneutical, phenomenological, social, appropriative, and practical methodologies. Thirty-eight theologians and scholars from sixteen different countries representing every continent on earth presented their work in either English or Italian. This volume offers the contributions of all English versions and the English translation of the Italian versions. Undoubtedly, the works collected here represent a new refreshing awareness of the methodological condition of the discipline and are a stimulus for further developments.