17 This, then, venerable brethren, is what the conscience of the Apostolic Office has imposed on us to make known, regarding the present condition of the Italian clergy. We do not doubt that in a thing of such gravity and importance you will add your zealous and loving care to our solicitude, inspired thereto especially by the bright example of the great Archbishop, St. Charles Borromeo. Therefore, to give effect to our admonitions, make them the subject of your diocesan conferences, and inform yourselves on such means as are necessary according to the needs of your respective diocese. To all these designs and deliberations you will not lack the aid of our authority.
Source: Fin dal Principio (Vatican.va)