19 Let all, then, continue in that unity of purpose and obedience that We have praised in the clergy, on another occasion, at length and with lively satisfaction. And, putting aside all uncertainties and fears easily understood in the first moments of the persecution, let the priests with their proved spirit of abnegation render ever more intense their sacred ministry, particularly among the young and the common people, striving to carry on a work of persuasion and of charity especially among the enemies of the Church, who combat her because they do not know her.
Source: Acerba Animi (Vatican.va)