Cardinal Newman recognized the obvious difference between the current Roman Church and the early church. He was too deep in history not to see it. He had to develop his famous idea of doctrinal development to explain it. He argued that all the later Roman doctrines and practices were “hidden” in the church from the beginning. They were made explicit over time under the guidance of the Spirit. But the problem that many Roman Catholics fail to see is that there is a difference between development and contradiction. It is one thing to use different language to teach something the church has always taught (e.g., the “Trinity”). It is another thing altogether to begin teaching something that the church always denied (e.g., papal supremacy or infallibility). Those doctrines in particular were built on multitudes of forgeries.
Cardinal Manning solved the problem by treating any appeal to history as treason. He called for blind faith in the papacy and magisterium. Such might have been possible had the fruits of the papacy over 1,500 years not consistently been the precise opposite of the fruit of the Spirit (Matt. 7:16).
Cardinal Newman said that to be deep in history is to cease to be a Protestant. The truth is that to be deep in real history, as opposed to Rome’s whitewashed, revisionist, and often forged history, is to cease to be a Roman Catholic.
https://www.ligonier.org/learn/articles/be-deep-history/
Cardinal Newman would be amazed as this revisionist view of him. Indeed, The Newman Club at all major universities uses his understanding of history, and doctrine to confirm Catholic theology in every dot and iota. If you hadn’t read his book “The Catholic Church,” I strongly suggest you do.