Stubborn,
I don't believe XavierSem would hold to that "just as efficacious." And, as the recipient can determine in part "how much grace is imparted," I guess sources can impart grace while imparting more or less grace than another source - hence, not "just as efficacious."
Well, Fr. Ripperger states this in the Introduction of his book
"The Merit of a Mass":
"The new rite of Mass is just as efficacious as the old rite of Mass in this respect since they are both the same sacrifice of Christ." After quoting some theologian about a week ago, XavierSem said:
"Therefore, the New Mass cannot be intrinsically evil in the way that a Black Mass is, because the Church cannot poison Her children". The thinking here is that the new "mass" is not evil because coming from the Church, it can't be evil. Whether he thinks it "just as efficacious" or not I cannot say, but either way, his thinking exemplifies that one does not necessarily need to believe as Fr. Ripperger that "it's just as efficacious," that apparently all one needs to do is accept is that the evil thing came from the Church, which means rather than being evil it is acceptable, and since it's acceptable it gives graces same as the true Mass. Which in turn, this thinking leads to other liberal ideas that come across in the writings and sermons etc. of indulters. Matto correctly called this "the indult perspective."