If true, that would be great. I still don't understand the whole fascination with an authority being infallible. Even supposing that the Church of Ecumenical Councils were infallible and teach the truth perfectly, that doesn't mean that you or I would, or for that matter could, infallibly understand that infallible teaching. If something is written in impeccably accurate latin, but the interpreter(s) only had a rough understanding of Latin, it's impeccability would be largely meaningless. How could it be important that something be infallible, when you have no way to convert that into something that can actually have use or be utilized? Anyway, I don't want to get into this again, maybe I should have kept my mouth shut, lol.
I suppose the best answer is the inspiration of the Holy Spirit. That's how people who are not gods partake of this thing called "uncreated grace" of God, even though we're all created.