Since then there is in the Church an authority, divinely appointed and plenary, for judgment and for appeal in questions of Scripture interpretation, in matters of faith and morals, therefore, by the very force of the words, there is one such authority, and only one.
Again, it follows hence, that, when the legitimate authority has spoken, to resist its interpretation is a sin against the faith and an act of heresy.
And from this again it follows, that, till the Infallible Authority formally interprets a passage of Scripture, there is nothing heretical in advocating a contrary interpretation, provided of course there is nothing in the act intrinsically inconsistent with the faith, or the pietas fidei, nothing of contempt or rebellion, nothing temerarious, nothing offensive or scandalous, in the manner of acting or the circumstances of the case. I repeat, I am all along inquiring what Scripture, by reason of its literal text, obliges us to believe. An original view about Scripture or its parts may be as little contrary to the mind of the Church about it, as it need be an offence against its inspiration.
What I gather from this is that it is not scandalous or weird for someone to hold a differing opinion before an official pronouncement has been made by the Church. Once the pronouncement has been made is it heretical to hold contrary, but before then people are free to hypothesize, philosophize, ruminate, postulate, and offer disagreements with others (within reason, I’m sure).
Here is a bonus quote from Joseph T. Lienhard from his book The Bible, the Church, and Authority which is along the same lines of reasoning:
“Generally, the early Church did not define its teachings on its own initiative. Instead, it defined them by reacting. Only when someone announced, ‘I’ve got it all figured out,’ did the Church take a long look at the solution, measure it against its sense of the faith, and often enough say, ‘No, you don’t; that’s not in line with our faith.'”
Disclaimer – This blog post is just that: a blog post with my personal thoughts. I am not a Catholic apologist or theologian. What I say here is not official doctrine of the Catholic Church. I am still learning and am susceptible to error. Don’t take anything here as Gospel. Don’t be stupid. Do your own research and learn for yourself what the Church teaches.
Catholics: if my understanding of Catholic doctrine needs adjustment, please point out my error.