Beaver:
My friend when one is a catholic, he is in God’s kingdom. So to say one is excluded from God’s kingdom is to say he is no longer a catholic. Mortal sin is very serious, that is why we have the sacraments. Baptism makes us members of this kingdom and confession restores the lost graces of baptism, after such a greavious sin has been commited. So when you said mortal sin has nothing to do with be catholic, I responded. I know the seriousness of this sin, and** it appeared to me that you did not.**
My point is that Catholics commit mortal sin (you would say they cease being Catholic at that point, and then are Catholic again after confession, I think? More on this below), and non-Catholics commit mortal sin. Hence, I concluded that mortal sin is not what defines the difference between Catholics and non-Catholics.
Beaver, can we agree on this much? Debating ideas in good faith (meaning, trying to maintain faith with the Church while using our fallible human reason) is not a sin, let alone a mortal one.
Now, the difference between our interpretations may come down to this: I don’t think “being” Catholic means one is (necessarily) in God’s kingdom. We Catholics HOPE we will be saved, but there is no way to know that until after this life is over. I do think being a faithful, active Catholic is the best, most reliable method of reaching Heaven. But the Church does not teach that Jews, for example, must be baptised to be saved (“The Jewish faith, unlike other non-Christian religions, is already a response to God’s revelation in the Old Covenant.” #839) We cannot say, for example, that ALL Jews are in a state of mortal sin.
You seem to say that being saved and being Catholic are one and the same thing. Even the Church doesn’t teach this, as I understand the CC. So, it appears you are setting up your own subjective definition of what a Catholic is (“one who is saved/in God’s kingdom”). I believe the Church allows the possibility that some will be saved who never were members of the Catholic Church #847,848, but also #1259, #1261), never even were baptized, and some (many?) who are baptised, receive the sacraments, attend Mass regularly may not be saved.
Note my language, “may”, “possibility”. Only God can determine who will be saved, and He can save whomever (baptised or not) He wishes. Most of us would be much wiser to take the surer route through the Church. I’m certainly not recommending leading a sinful life, outside the Church, and then testing my theory to see what God does with you!
But I don’t believe anything I’ve said or done here constitutes a sin, mortal or venial, on my part. Unless I have spoken to you without due respect, and thus been guilt of a venial sin. If so, I do apologize. And I may be mistaken in my interpretation and understandings of these teachings. But that is not a sin, certainly not a mortal sin.