the Catholic Church approved the new Testament...what’s wrong with this picture?
The formation of the New Testament canon (A.D. 100-220)
The idea of a complete and clear-cut canon of the New Testament existing from the beginning, that is from Apostolic times, has no foundation in history. The Canon of the New Testament, like that of the Old, is the result of a development, of a process at once stimulated by disputes with doubters, both within and without the Church, and retarded by certain obscurities and natural hesitations, and which did not reach its final term until the dogmatic definition of the Tridentine Council.The witness of the New Testament to itself: The first collections
Those writings which possessed the unmistakable stamp and guarantee of Apostolic origin must from the very first have been specially prized and venerated, and their copies eagerly sought by local Churches and individual Christians of means, in preference to the narratives and Logia, or Sayings of Christ, coming from less authorized sources. Already in the New Testament itself there is some evidence of a certain diffusion of canonical books: II Peter, iii, 15, 16, supposes its readers to be acquainted with some of St. Paul's Epistles; St. John's Gospel implicitly presupposes the existence of the Synoptics (Matthew, Mark, and Luke).
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The principle of canonicity
Before entering into the historical proof for this primitive emergence of a compact, nucleative Canon, it is pertinent to briefly examine this problem: During the formative period what principle operated in the selection of the New Testament writings and their recognition as Divine?--
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The period of discussion (A.D. 220-367)
In this stage of the historical development of the Canon of the New Testament we encounter for the first time a consciousness reflected in certain ecclesiastical writers, of the differences between the sacred collections in divers sections of Christendom. This variation is witnessed to, and the discussion stimulated by, two of the most learned men of Christian antiquity, Origen, and Eusebius of Cæsarea, the ecclesiastical historian. A glance at the Canon as exhibited in the authorities of the African, or Carthaginian, Church, will complete our brief survey of this period of diversity and discussion:-[...]
The period of fixation (A.D. 367-405)
St. AthanasiusWhile the influence of Athanasius on the Canon of the Old Testament was negative and exclusive (see supra), in that of the New Testament it was trenchantly constructive. In his "Epistola Festalis" (A.D. 367) the illustrious Bishop of Alexandria ranks all of Origen's New Testament Antilegomena, which are identical with the deuteros, boldly inside the Canon, without noticing any of the scruples about them. Thenceforward they were formally and firmly fixed in the Alexandrian Canon.
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