As an observation,
Re: “probably referring to” … that statement from the USCCB doesn’t negate what I’ve said earlier.
Allow me to explain
The Greek word (from the Greek NT) used in that passage 1 Jn 5:16…] for “leading to death”
θάνατον, i.e. mortal can mean physical as well as spiritual death
θάνατον, = “
thánatos (derived from
2348 /thnḗskō, “to die”) – physical or spiritual
death; (figuratively) separation from the life (salvation) of God forever by dying without first experiencing
death to self to receive His gift of salvation.”
And the Church teaches, one who is in mortal sin is spiritually dead
1033 . If that person dies (physically) in mortal sin then they won’t inherit heaven, i.e. won’t be saved.
1035
The USCCB which you quote for the source of your quote here, doesn’t contradict what I previously wrote.
From USCCB which you quote (all emphasis mine)
“*
5:13–
21] As children of God we have confidence in prayer because of our intimate relationship with him (
1 Jn 5:14–
15). In love, we pray (
1 Jn 5:16–
17) for those who are in sin, but not in deadly sin (literally, “sin unto death”), probably referring to apostasy or activities brought on under the antichrist; cf.
Mk 3:29;
Heb 6:4–
6;
10:26–
31. Even in the latter case, however, prayer, while not enjoined, is not forbidden. The letter concludes with a summary of the themes of the letter (
1 Jn 5:18–
20). There is a sharp antithesis between the children of God and those belonging to the world and to the evil one. The Son reveals the God of truth; Christians dwell in the true God, in his Son, and have eternal life. The final verse (
1 Jn 5:21) voices a perennial warning about idols, any type of rival to God.”
iow, John is saying [1 Jn 5:16-21] we can know if “a brother” sins mortally, or not mortally. Otherwise he would have said nothing on this.
So Catholics need to be pro active with “a brother” or “a sister” in faith to not sin mortally, through any of the usual means, but also through voting