Quadragesimo Anno §20

²⁰ And so, with Leo's Encyclical pointing the way and furnishing the light, a true Catholic social science has arisen, which is daily fostered and enriched by the tireless efforts of those chosen men whom We have termed auxiliaries of the Church. They do not, indeed, allow their science to lie hidden behind learned walls. As the useful and well attended courses instituted in Catholic universities, colleges, and seminaries, the social congresses and "weeks" that are held at frequent intervals with most successful results, the study groups that are promoted, and finally the timely and sound publications that are disseminated everywhere and in every possible way, clearly show, these men bring their science out into the full light and stress of life.