Pierre Charles was a professor of Dogmatic theology for the rest of his life in the Jesuit Theologate of Louvain. As a teacher he captivated his students and, although he taught almost all theological treatises, his favourite was that of the Incarnation. Solidly based on a deep knowledge of philosophy and theology, and enlivened by deep personal conviction, was always oriented towards a synthesis. His theology thinking inspired his own inner life and shed light upon all human realities. His original approach and ideas crystallized in his best-selling book of meditations: ‘La prière de toutes les heures’, published in 1924.
"Missiology" pioneer
Possibly incited by the encyclical Maximum Illud of Benedict XV he turned his attention to missionary issues. From 1923, responding to requests coming from the Lemfu Seminary - first ever training centre for seminarians of the Belgian Congo - Charles launches the "Xaveriana" collection, a series of pamphlets that dealt with aspects of missionary life and activities, starting with down-to-earth pastoral issues: polygamy, sorcery, etc. Since then, he has endeavoured to develop a "Missiology", to the point that it was fully accepted as one of the theological subjects in Louvain. If not the first in the Catholic Church, Charles stands however as unique in the French speaking theological area. Almost from the beginning Charles acted as true animator and promoter of the Semaine missiologique de Louvain begun by Albert Lallemand In 1926, Charles began the publication of dossiers de l'Action Missionnaire, a means for the dissemination of important documents on missionary problems. It maintained that the essential work of the missions was, in the first place, to "plant" the Church. This is why their primary objective was the establishment of the native clergy. Pius XI continued his efforts and, by consecrating the first indigenous bishops in Africa, China, India, indirectly approved these ideas of Charles. After some Advent sermons preached to the students of Louvain, he founded with a group of them the Association Universitaire Catholique pour l'Aide aux missions , which would eventually mature into an organization to form African health assistants, and another sister organization "for the scientific progress of agriculture". These associations helped establish the first Congolese University level institute. Charles was the cheerleading force of all these projects, always ready to help them with his word and pen. In response to multiple requests, he travelled a lot, and his knowledge of mission lands and their peoples taught him how to collaborate with national and international agencies. Charles gave also numerous retreats to priests and religious, enjoying it, because he could better expose his ideas than in pulpit preaching. He was a distinguished professor and theologian, lecturer and writer, and acknowledged as a Missiology pioneer, particularly in the French speaking area of Europe, and founder of partnerships to assist mission initiatives. Pierre Charles died in the Jesuit theologate of Louvain on 11 February 1954.