The Spirit of Catholicism is a classic work on the Catholic Faith by Prof. Dr. Karl Adam of Tuebingen University in Germany. It delves into the origins of the Church, its beliefs, history, constitution, doctrine and sacraments. Titled in German Das Wesen des Katholismus (The Essence of Catholicism) it was originally published in 1924 but is still recognized to this day as perhaps the best explanation of Catholicism available to the average man. Dr. Adam does not hesitate to tackle the difficult questions of Catholic belief, such as "no salvation outside the Church" and explains what it means to the non-Catholic Christian of good will who loves God but has not yet recognized his Mother Church, the Catholic Church the mother of Christianity. Recognized as perhaps the greatest theologian of the Twentieth-Century, Prof. Adam's belief and deep seated good will toward all Christians is evident in all of his writings. Anyone who wishes to deepen their faith will do well to read this timeless epic. The edition has been edited for readable paragraphs and includes a subject Index for students and researchers.