I have notice that many Catholics think that if something is not
"de fide" teaching, that they are free to reject it!
This is a serious error.
For instance, the Baltimore Catechism teaches SO many truths, and there are no labels as to whether something is "de fide" or not, so how do we know which is and which is not?
We don't know....
We are not supposed to know which is or is not - because that is for confessors to use. We are only supposed to know that we are obliged under pain of
mortal sin to believe everything in the Catechism because the pope approved of it for general Catholic learning.
Now, take a look at this approved chart of the various
theological notes attached to teaching that was designed for confessors:
http://genus.cogia.net/Cartechini.pdfTake care to notice that even though something may not be labeled with "de fide", it can otherwise be labeled as:
proxima fidei
theologicae certum
doctrina catholica
The chart shows that those who reject teachings labeled as such, would still commit a mortal sin, as would anyone promoting doubting what is taught by the Baltimore Catechism.
So, would you dare, for example, to reject the doctrine of
guardian angels because you doubt it is "de fide"?
If you dare, it is a mortal sin, and you choose hell by doing so!
Think about how serious this subject is.