For example, was the early Church teaching on confession and the Eucharist false, as I believe many Protestants would argue?
Which Protestants? And which teaching? As interpreted how? (After all, the Fathers are not necessarily any easier to interpret than Scripture itself!)
Taking confession: Calvin’s interpretation of this is that the early Church viewed confession as a penitential discipline rather than as something necessary for salvation in itself. I believe that the standard scholarly view is that private confession began with monasticism and was popularized in the West by the Irish monks around the Carolingian era. Before that time confession was only necessary for a few extremely grave sins and was a public act. A Catholic friend of mine has pointed out to me that St. John Chrysostom speaks of private confession, so obviously the claim that it all originated with the Irish is false, but I think it does seem pretty clear that the practice began with monks and spread gradually among the lay population.
As for Eucharist: it’s not until the fourth century that anyone (to my knowledge) propounded a view of the Eucharist clearly incompatible with Calvin’s teaching (I use Calvin because on these matters he’s pretty much in the center of traditional Protestantism, as well as being extremely influential, of course). Even then, this “metabolic” view is not found in all the relevant theological texts (Augustine more often expresses himself in a manner that Calvin would agree with–in fact Calvin and other Reformed theologians were clearly influenced by Augustine in the way they formulated their sacramental theology) and does not seem to have been imposed as orthodoxy. Only in the Carolingian era, with Radbertus and Ratramnus, does the matter seem to have become a subject of serious controversy (Catholics can use this too, of course–but I’m telling the story from the other side), and only with Berengar in the 11th century was the more spiritual/symbolic view clearly condemned as heresy. (Note: Berengar, Ratramnus, and Calvin all believed in the Real Presence in some form–we are not talking about pure memorialism.) Gary Macy’s
The Banquet’s Wisdom stresses the diversity of views on the Eucharist until about the 13th century–I think Macy exaggerates somewhat, but he is a respected scholar (and a Catholic, although by your standards no doubt an extremely liberal one).
The point where I think this argument breaks down is with regard to the adoration of Christ in the Sacrament. At least by the fourth century, this seems to have been taken for granted–indeed, Augustine’s injunctions to worship Christ in the Eucharist are the main counter-examples to the more “Calvinist” things he said when speaking theoretically. It seems to me that the Reformers generally ignored this, no doubt in part because when they thought “adoration of the Sacrament” they thought primarily of extra-liturgical adoration which was so prominent a part of late medieval Western Catholic piety, and they could easily show that this didn’t go back more than a few centuries.
The early Church also gave the nod to the Bishop of Rome, considered to be Peter’s successor
As I’m sure you are aware, that is hugely controversial. You show this by your extremely vague language. Of course they “gave the nod,” but a nod doesn’t establish much, does it!
and Mary was also much venerated in the early Church, certainly more so than most Protestants venerate her today
As with the worship of Christ in the sacrament, I think this is one of the places where Calvin’s arguments (and those of other Reformers falls down badly. And as in that other case, the problem is that he focuses on formal theological writing. In part he can be excused, because not as many sources were available, especially archeological ones and less formal texts. Calvin would say that originally Mary was just seen as a holy woman and a model believer, and that gradually “superstitious” elements crept in. But when you put the veneration of Mary for which we have fourth-century evidence (or even earlier in the case of the “Sub Tuum Praesidium”–of course this wasn’t known to the Reformers) together with Calvin’s strong statements about Catholic devotion to the saints being idolatry, I think you have a serious problem for classical Protestantism. Philip Schaff put it well and honestly in his mammoth church history, pointing out that there’s plenty of evidence from the fourth century for devotions to the saints that would probably have made the Fathers of Trent rather nervous–that in fact the fourth-century Fathers were in many ways more problematic from a Protestant perspective than the documents of Trent. This is the kind of thing, of course, that got Schaff accused of being pro-Catholic (hard as this is to believe when you read much of his writing) and which eventually forced many Protestants to take a more ecumenical position.
Edwin