There is an extensive discussion on this same topic here:
forums.catholic-questions.org/showthread.php?t=497663
The Catholic Church THEN is not the same as today insofar as THEN they didn’t have cell phones and fax machines. We have truckloads of all sorts of evidence that her teachings remain unchanged, but the problem is not with Catholic teachings, it’s with those who have no doctrinal development. Those who make this charge are actually reductionists. The Church THEN did not have to contend with in vitro fertilization or human cloning. Since reductionist Protestants don’t believe in any kind of central authority, they are reduced to declaring heresy or immoralities based on personal opinion.
*"By development of doctrine, we mean that some divinely revealed truth has become more deeply understood and more clearly perceived than it had been before. Under the guidance of the Holy Spirit, whom Christ promised to send to teach us, the Church comes to see more deeply what she had always believed, and the resulting insights find expression in devotion of the faithful that may have been quite uncommon in the Church’s previous history. The whole spectrum of Christology and Mariology has witnessed such dogmatic progress. Adoration of the Eucharist, therefore, is simply another, though dramatic, example of doctrinal development.
Always implied in such progress is that, objectively, the revealed truth remains constant and unchanged. But through the light of the Holy Spirit, the subjective understanding of the truth becomes more clear, its meaning becomes more certain and its grasp by the believing mind becomes increasingly more firm."
*
The History of Eucharistic Adoration
Development of Doctrine in the Catholic Church by Fr. John A. Hardon, S.J.
http://www.therealpresence.org/eucharst/manual/section1/sec1_12a.pdf
Reductionist Protestants do not have this mechanism, and if they don’t have it, then neither should anyone else. Hence the charge: “the Catholic Church is not the same as it was…”
They tried to reduce “faith” without the sacraments, revelation to Scripture alone, righteousness into a mere declaration without the person’s status itself. I hope I do not offend anyone here, and I’m not trying to, but whenever I read Protestant theology, it seems like it is a reductionist Christianity.
When they do not understand how the Cross and the Mass can be the same sacrifice, they reject it. If they do not understand how Mary can be the Mother of God, they reject it.
If they do not understand how a person can partake the sufferings of God so that he can offer his sufferings for another, they reject it. If they cannot understand why a mere man is chosen to feed His sheep, they reject it.
My question is, as it is the same to Ockhamists or reductionist philosophers, why take the reductionist position rather than the mystery? Is it because if we take the mystery, we will have to acknowledge our limitations? The issue is really humility isn’t it?