From Pope St. John Paul II’s Apostolic Exhortation Reconciliatio et Pænitentia (1984):
Pastors who are zealous and creative never lack opportunities for imparting this broad and varied catechesis, taking into account the different degrees of education and religious formation of those to whom they speak. Such opportunities are often given by the biblical readings and the rites of the Mass and the sacraments, as also by the circumstances of their celebration. For the same purpose many initiatives can be taken such as sermons, lectures, discussions, meetings, courses of religious education, etc., as happens in many places. Here I wish to point out in particular the importance and effectiveness of the old-style popular missions for the purposes of such catechesis. If adapted to the peculiar needs of the present time, such missions can be, today as yesterday, a useful instrument of religious education also regarding penance and reconciliation.
In view of the great relevance of reconciliation based on conversion in the delicate field of human relationships and social interaction at all levels, including the international level, catechesis cannot fail to inculcate the valuable contribution of the church’s social teaching. The timely and precise teaching of my predecessors from Pope Leo XIII onward, to which was added the substantial contribution the pastoral constitution Gaudium et Spes of the Second Vatican Council and the contributions of the different episcopates elicited by various circumstances in their respective countries, has made up an ample and solid body of doctrine. This regards the many different needs inherent in the life of the human community, in relationships between individuals, families, groups in their different spheres and in the very constitution of a society that intends to follow the moral law, which is the foundation of civilization.
At the basis of this social teaching of the church there is obviously to be found the vision which the church draws from the word of God concerning the rights and duties of individuals, the family and the community; concerning the value of liberty and the nature of justice, concerning the primacy of charity, concerning the dignity of the human person and the exigencies of the common good to which politics and the economy itself must be directed. Upon these fundamental principles of the social magisterium, which confirm and repropose the universal dictates of reason and of the conscience of peoples, there rests in great part the hope for a peaceful solution to many social conflicts and, in short, the hope for universal reconciliation.
— Reconciliatio et Pænitentia 26