From Pope St. John Paul II’s encyclical Veritatis Splendor (1993):
In their desire, however, to keep the moral life in a Christian context, certain moral theologians have introduced a sharp distinction, contrary to Catholic doctrine,63 between an ethical order, which would be human in origin and of value for this world alone, and an order of salvation, for which only certain intentions and interior attitudes regarding God and neighbour would be significant. This has then led to an actual denial that there exists, in Divine Revelation, a specific and determined moral content, universally valid and permanent. The word of God would be limited to proposing an exhortation, a generic parænesis, which the autonomous reason alone would then have the task of completing with normative directives which are truly “objective”, that is, adapted to the concrete historical situation. Naturally, an autonomy conceived in this way also involves the denial of a specific doctrinal competence on the part of the Church and her Magisterium with regard to particular moral norms which deal with the so-called “human good”. Such norms would not be part of the proper content of Revelation, and would not in themselves be relevant for salvation.
No one can fail to see that such an interpretation of the autonomy of human reason involves positions incompatible with Catholic teaching.
In such a context it is absolutely necessary to clarify, in the light of the word of God and the living Tradition of the Church, the fundamental notions of human freedom and of the moral law, as well as their profound and intimate relationship. Only thus will it be possible to respond to the rightful claims of human reason in a way which accepts the valid elements present in certain currents of contemporary moral theology without compromising the Church’s heritage of moral teaching with ideas derived from an erroneous concept of autonomy.
63 Cf. Ecumenical Council of Trent, Sess. VI, Decree on Justification Cum Hoc Tempore, Canons 19-21: H. Denzinger-A Schönmetzer, Enchiridion Symbolorum Definitionum et Declarationum de Rebus Fidei et Morum, 1569-1571.
— Veritatis Splendor 37