32 Among other things, with unspeakable sorrow he exclaims: "Lo, the world is full of priests, but rare indeed it is to find a worker in the hands of God; we do indeed assume the priestly office, but the obligation of the office we do not fulfill" (Hom. in Evang. n. 3). What force the Church would have today could she count a worker in every priest! What abundant fruit would the supernatural life of the Church produce in souls were it efficaciously promoted by all. Gregory succeeded in his own times in strenuously stimulating this spirit of energetic action, and such was the impulse given by him that the same spirit was kept alive during the succeeding ages. The whole mediaeval period bears what may be called the Gregorian imprint; almost everything it had indeed came to it from the Pontiff - the rule of ecclesiastical government, the manifold phases of charity and philanthropy in its social institutions, the principles of the most perfect Christian asceticism and of monastic life, the arrangement of the liturgy and the art of sacred music.
Source: Iucunda Sane (Vatican.va)