21 Surely we ought not to desert them nor leave them to their fancies; but with mildness and charity draw them to us, using every means of persuasion to induce them to examine closely every part of the Catholic doctrine, and to free themselves from preconceived notions. In this matter, if the first place belongs to the bishops and clergy, the second belongs to the laity, who have it in their power to aid the apostolic efforts of the clergy by the probity of their morals and the integrity of their lives. Great is the force of example; particularly with those who are earnestly seeking the truth, and who, from a certain inborn virtuous disposition, are striving to live an honorable and upright life, to which class very many of your fellow-citizens belong. If the spectacle of Christian virtues exerted the powerful influence over the heathens blinded, as they were, by inveterate superstition, which the records of history attest, shall we think it powerless to eradicate error in the case of those who have been initiated into the Christian religion?
Source: Longinqua (Vatican.va)