The problem, of course, is that there is no end to development of doctrine, such that a woman can be called a man and vice-versa, because “what was given once for all is understood more and more clearly.”
This is the claim made over and over again by the US Supreme Court in setting forth its more and more radical doctrines.
The problem, of course, is that there is no end to development of doctrine, such that a woman can be called a man and vice-versa, because “what was given once for all is understood more and more clearly.” This is the claim made over and over again by the US Supreme Court in setting forth its more and more radical doctrines. St. John Henry Newman - the person quoted in the OP regarding the Immaculate Conception - not ironically is known as the father of the theory of the development of doctrine:
At first, this clear lack of patristic consensus led Rome to embrace a new theory in the late nineteenth century to explain its teachings—the theory initiated by John Henry Newman known as the development of doctrine. In light of the historical reality, Newman had come to the conclusion that the Vincentian principle of unanimous consent was unworkable, because, for all practical purposes, it was nonexistent. To quote Newman: It does not seem possible, then, to avoid the conclusion that, whatever be the proper key for harmonizing the records and documents of the early and later Church, and true as the dictum of Vincentius must be considered in the abstract, and possible as its application might be in his own age, when he might almost ask the primitive centuries for their testimony, it is hardly available now, or effective of any satisfactory result. The solution it offers is as difficult as the original problem.
The obvious problem with Newman’s analysis and conclusion is that it flies in the face of the decrees of Trent and Vatican I, both of which decreed that the unanimous consent of the fathers does exist. But to circumvent the lack of patristic witness for the distinctive Roman Catholic dogmas, Newman set forth his theory of development, which was embraced by the Roman Catholic Church. Ironically, this is a theory which, like unanimous consent, has its roots in the teaching of Vincent of Lerins, who also promulgated a concept of development. While rejecting Vincent’s rule of universality, antiquity and consent, Rome, through Newman, once again turned to Vincent for validation of its new theory of tradition and history. But while Rome and Vincent both use the term development, they are miles apart in their understanding of the meaning of the principle because Rome’s definition of development and Vincent’s are diametrically opposed to one another. In his teaching, Vincent delineates the following parameters for true development of doctrine:
But some one will say. perhaps, Shall there, then, be no progress in Christ’s Church? Certainly; all possible progress. For what being is there, so envious of men, so full of hatred to God, who would seek to forbid it? Yet on condition that it be real progress, not alteration of the faith. For progress requires that the subject be enlarged in itself, alteration, that it be transformed into something else. The intelligence, then, the knowledge, the wisdom, as well of individuals as of all, as well of one man as of the whole Church, ought, in the course of ages and centuries, to increase and make much and vigorous progress; but yet only in its own kind; that is to say, in the same doctrine, in the same sense, and in the same meaning. (From Rome’s New and Novel Concept of Tradition)