Don’t take this the wrong, Mack, because I don’t mean it disrespectfully, but how do we know he isn’t speaking wrongly? How do we know that his office is what the Catholic Church says it is? I accept his office as Bishop of Rome, and that of patriarch of the west. How do we know that his office has greater ability to speak for the whole Church than say, the Bishop of Antioch?Yes.
This is the way I see it: when President Harrison spoke we really don’t know if he were guided by the Holy Spirit. I like to think that he was, but that is simply my, and yours, opinion. Now, I don’t know why anybody else on the planet also can’t be guided or moved by the Holy Spirit; and if they were, it would mean that they would be infallible, or inerrant (whatever word you want to use) by the very fact of the Holy Spirit.
However, how do we actually know for a fact if they are indeed moved by Holy Spirit? We don’t, we have only our own opinion. And we want to know, not merely have opinion. That is where the infallibillity of the pope comes in. Even so, we must realize, infallibillity isn’t quite the same thing as being guided by the Holy Spirit. Because infallibillity is a negative guarantee, that is, the pope isn’t necessarily given the truth, but is merely prevented by the Holy Spirit from speaking untruth (when speaking ex cathedra). Otherwise, the pope can have his own personal opinions, like everyone else. (But, like all opinions, his would have more weight than others.)
The idea is, when the pope speaks ex cathedra we know that he isn’t giving false opinion; we know he isn’t speaking wrongly, because the Holy Spirit won’t allow him to speak if it is wrong. (This is not because of any particular merit on his own part, but because of his office.)
Jon