The difference you’re highlighting (Sacramental vs. non-sacramental) doesn’t seem to be established in the Catechism (or anywhere else) AFAIK.
THAT’S BECAUSE THE CATECHISM DOESN’T ADDRESS OTHER ECCLESIAL COMMUNITIES AND THEIR BELIEFS!!!
God understands when a deacon and a priest are working together and they say “We”.
Except that the rituals are pretty explicit that only one cleric baptizes. (And, in nuptial ceremonies, that the cleric who asks for the expression of consent is the one who receives it, and then articulate the vows of the couple.). So… “we” is never part of the sacraments of the Church!
I’m tempted to ask “what if they didn’t know the priest was invalid but they did remember their mortal sins” (e.g. people generally don’t forget their sexual misdeeds even decades later) but we’ve been down “What if Road” enough in this thread and I’ll refrain from here.
My understanding is that some folks
will re-confess sins that had been previously confessed and absolved. The degree of pastoral care that a priest confessor must exhibit is truly amazing and humbling!
I personally find that a bit reckless but whatever.
When I’ve taught (CCD / RCIA), my advice has always been “if you think it’s a serious sin, confess it explicitly; you don’t need to decide whether it’s mortal or not.”
He admires her beauty and mistakenly believes he committed a mortal sin of lust. However it was only venal. We know this. Objectively it is so.
OK – so, your thought experiment is “what if a person mistakenly thinks his sin is mortal, but it’s really just venial; does he go to hell for it”? No – if he has perfect contrition, then he’s forgiven (and if he never has the chance to get to confession, that’s ok – but if he
does have the opportunity, he should take advantage of the opportunity).
And what of Christ who said few find the road to salvation while many enter the road of destruction?
Note that this speaks of the actions of humans, and not of the mercy of God. Might God grant mercy to someone who had – at one point – “entered the road of destruction”? Of course!
One
does get that impression of him, no?