Matthew 18, 15-20 + CSDC and CV

(CV 26a) On the cultural plane, compared with Paul VI's day, the difference is even more marked. At that time cultures were relatively well defined and had greater opportunity to defend themselves against attempts to merge them into one. Today the possibilities of interaction between cultures have increased significantly, giving rise to new openings for intercultural dialogue: a dialogue that, if it is to be effective, has to set out from a deep-seated knowledge of the specific identity of the various dialogue partners. Let it not be forgotten that the increased commercialization of cultural exchange today leads to a twofold danger. 

Rerum Novarum lists errors that give rise to social ills

CSDC 89b. Rerum Novarum lists errors that give rise to social ills, excludes socialism as a remedy and expounds with precision and in contemporary terms “the Catholic doctrine on work, the right to property, the principle of collaboration instead of class struggle as the fundamental means for social change, the rights of the weak, the dignity of the poor and the obligations of the rich, the perfecting of justice through charity, on the right to form professional associations”[144].

Notes: [144] Congregation for Catholic Education, Guidelines for the Study and Teaching of the Church's Social Doctrine in the Formation of Priests, 20, Vatican Polyglot Press, Rome 1988, p. 24.

(Mt 18, 15-20) The way of love

[15] "If your brother sins (against you), go and tell him his fault between you and him alone. If he listens to you, you have won over your brother. [16] If he does not listen, take one or two others along with you, so that 'every fact may be established on the testimony  of two or three witnesses.' [17] If he refuses to listen to them, tell the church. If he refuses to listen even to the church, then treat him as you would a Gentile or a tax collector. [18] Amen, I say to you, whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven. [19] Again, (amen,) I say to you, if two of you agree on earth about anything for which they are to pray, it shall be granted to them by my heavenly Father. [20] For where two or three are gathered together in my name, there am I in the midst of them." 

CSDC 205. It is from the inner wellspring of love that the values of truth, freedom and justice are born and grow. Human life in society is ordered, bears fruits of goodness and responds to human dignity when it is founded on truth; when it is lived in justice, that is, in the effective respect of rights and in the faithful carrying out of corresponding duties; when it is animated by selflessness, which makes the needs and requirements of others seem as one's own and intensifies the communion of spiritual values and the concern for material necessities; when it is brought about in the freedom that befits the dignity of men and women, prompted by their rational nature to accept responsibility for their actions[451]. These values constitute the pillars which give strength and consistency to the edifice of life and deeds: they are values that determine the quality of every social action and institution.

Notes: [451] Cf. John XXIII, Encyclical Letter Pacem in Terris: AAS 55 (1963), 265-267.

[Initials and Abbreviations.- CSDC: Pontifical Council for Justice And Peace, Compendium of the Social Doctrine of the Church; -  SDC: Social Doctrine of the Church; - CV: Benedict XVI, Caritas in Veritate (Charity in truth)]