13 While it is a very praiseworthy thing for the clergy, and especially the younger clergy, to go to the people, nevertheless, they must proceed in this matter with due obedience to authority and the commands of their ecclesiastical superiors. In devoting themselves according to this submission to the cause of Popular Christian Action, their noble duty must be "to rescue the children of the people from ignorance of spiritual and eternal things, encouraging them by their kindness to live honestly and virtuously; to strengthen adults in the faith, fortifying them in the practice of the Christian life by removing all contrary influences; to foster among the Catholic laity those institutions which are really instrumental in improving the moral and material welfare of the masses; and above all, to defend the principles of evangelical justice and charity, applying equally to everyone the rights and duties of civil society. . . Let them, moreover, be ever mindful that even among the people the priest should inviolately preserve his novel character as a minister of God, being placed at the head of his brethren for their salvation. In devoting himself to the people should he do anything contrary to the dignity of the priesthood or ecclesiastical duties or discipline, he must be rebuked."
Source: Pieni L'Animo (Vatican.va)