As I understand it, Catholics are definitely not allowed to public teach or proclaim heresy. But are they allowed to privately engage with heretical ideas?
Is it a sin to think through and weigh heretical ideas (as opposed to simply asking questions and trying to understand why they are wrong)? Is it a sin to discuss them in private with friends? As in discuss reasons why the ideas are compelling as well as reasons why they’re not as opposed to simply exercising apologetics. Is it a sin to discuss them in a way that’s nominally public but not widely disseminated, like an internet forum?
There’s a fundamental difference when discussing an idea between looking at it from all sides, considering why it might be true or false or in what sense it might be true, and trying to find why an idea if wrong. The latter is ‘apologetics’, which is allowed when considering heretical ideas. The former is something different and I don’t know whether it is allowed.
In particular, I’m not Catholic, so I’m not asking for my benefit directly. It’s more a question of whether I should be kind to my Catholic friends and not try to discuss heretical ideas with them. I don’t want to lead any of my friends in sin.
I don’t really see the distinction but that’s just me.
It would be charitable of your Catholic friends to have you bring up ideas that you believe are heretical, and for them to provide feedback as to what the Church teaches In doing so they would convey why an idea is heretical. And yes, this is apologetics: explaining and defending the faith.
The one additional thing though I would state, is that if your Catholic friends don’t know what the Church teaches, they need to find out. Many have left the Church not knowing what it is that the Church believes. Doing so, they don’t even have an informed intellect.
What’s the One big heretical thought that you have in mind?
Heresy is dissent. Dissent has its origin in heaven, but is also clearly described in Genesis 3. All dissent derives from that narrative of first cause, and it is worth pondering as to its nature and consequences.
It is a strange that you are concerned that you may lead your friends into what they think is sin precisely because it possibly strays from what they think is the truth which you do not think is the truth. Are you sure you aren’t suppressing some act of faith yourself?
Anyway, it is fine, as long as they are regarded as untrue and there is little danger of falling into believing them - some of which are easier than others.
It’s more that I’m used, with some of friends, of a certain style of discussion where you take an idea (not necessarily religious) that’s a little unusual and try to see what sort of truth it might contain. With an unusual idea, it’s not interesting to just bat it down, the point is to see what you can learn from it.
Recently in a conversation that involved a Catholic friend, I turned the discussion to an idea I had come across in a novel that was rather heretical. (The book was banned back when it was published in the 19th century), and my Catholic friend got very uncomfortable with the discussion.
Of course, I changed the subject when I noticed and I asked them later and it seemed they thought it was a sin to discuss this idea positively. I’m not trying to convince them or anyone else; I just thought that idea was novel and I had never encountered it before.
I know to be more careful around this friend in the future (though it was the first time I’d ever seen them so uncomfortable). If it’s a sin to discuss ideas like this with Catholics generally, then out of respect, I won’t do it. So my question here is more whether this was sensitivity of this friend or something I should be mindful of generally.
Yeah, I think don’t go there with someone who doesn’t want to go there with you in a discussion. But, in general, no; you may come to a deeper understanding, of whatever truth is in question, by discussing a heresy. But, as St. Paul said, (I think it was about eating pagan sacrifices) try to avoid scandal; people may overhear and get the wrong idea.
At some point a heresy has to be discussed in order to determine if it’s a heresy.