>>> HOW would this happen?
According to point 5 of the original post under “what Catholisism teaches”, it would happen in response to the committing of a mortal sin.
And, since God word states that if you are guilty of one sin, you are guilty of them all, I would submit that we would lose salvation daily if it could be lost.
“I refer to those whose sin does not lead to death. There is a sin that leads to death. I am not saying that you should pray about that. All wrongdoing is sin, and there is sin that does not lead to death.”
Some sins lead to spiritual death, or eternal separation from God. Catholics call these sins, mortal. Other sins don’t lead to spiritual death. Catholics call these sins, venial
Ah... Catholic teaching!
The Bible says that loss of FAITH is what does the deed.