From Pope St. John Paul II’s Apostolic Exhortation Familiaris Consortio (1981):
In conformity with her constant tradition, the Church receives from the various cultures everything that is able to express better the unsearchable riches of Christ.18 Only with the help of all the cultures will it be possible for these riches to be manifested ever more clearly, and for the Church to progress towards a daily more complete and profound awareness of the truth, which has already been given to her in its entirety by the Lord.
Holding fast to the two principles of the compatibility with the Gospel of the various cultures to be taken up, and of communion with the universal Church, there must be further study, particularly by the Episcopal Conferences and the appropriate departments of the Roman Curia, and greater pastoral diligence so that this “inculturation” of the Christian faith may come about ever more extensively, in the context of marriage and the family as well as in other fields.
It is by means of “inculturation” that one proceeds towards the full restoration of the covenant with the Wisdom of God, which is Christ Himself. The whole Church will be enriched also by the cultures which, though lacking technology, abound in human wisdom and are enlivened by profound moral values.
So that the goal of this journey might be clear and consequently the way plainly indicated, the Synod was right to begin by considering in depth the original design of God for marriage and the family: it “went back to the beginning,” in deference to the teaching of Christ.19
18 Cf. Eph 3: 8; Pastoral Constitution on the Church in the Modern World Gaudium et spes, 44; Ad gentes, 15, 22.
19 Cf. Mt 19: 4-6.
— Familiaris Consortio 10