Ok, yes, that Tome.
And how does it bear on the Church’s understanding of teaching infallibly, the topic of this thread?
I’m the trouble-maker in this case. I hold some doubts that infallibility is absolute in every matter of faith and my ‘for instance’ is the part of the Tome of Pope Leo where it says, “Christ is one
in two natures”. I maintain that to be totally correct Pope Leo should have said, “Christ is one
from two natures”. I suppose I am saying that there is a controversy with regard to the Diophysite/Miaphysite views. Both views are considered orthodox today by Rome. Some say that they are really one and the same view, only expressing that one view in two different ways. I find this hard to believe, I see that they are different views, different enough that they both cannot be true. I hold the Miaphysite view which is what you would hold if you believed Pope Leo’s wording should have been “Christ is one
from two natures”, which is: ‘Christ has one composite nature, human and divine, united in one nature and one person without confusion, without change, without division, without separation.’ The Diophysite view comes from how Pope Leo did word it, namely, “Christ is one
in two natures”, which is: ‘Christ has two natures, human and divine, united in one person without confusion, without change, without division, without separation’.
Of course, I can only have a good point here if every assumption that I have made here is correct.
I think infallibility, biblically, comes from Luke 22:32, “I have prayed for you, that your faith may not fail; and you, when once you have turned again, strengthen your brothers”. And the answer I have for myself is that there are certain beliefs that do not harm a soul to the point of spiritual death. Just as there are mortal sins and venial sins there are mortal and venial mis-beliefs. I thing only the mortal mis-beliefs should be called “heresies”. And the promise to the successor to St. Peter goes no further than the fact that the Pope cannot teach heresy (under this specific definition) to the Church. This seems to be where the stalemate ended since I am all alone on this conclusion. The consensus of others is that they are really one and the same view, only expressing that one view in two different ways. (Either this or that the Tome of Pope Leo is not a valid example of ordinary infallibility.)