When James in his book talks about works, that we are saved by faith and works, he is not saying that we are saved by works. He is saying a person who has no works though saved by faith makes his faith as though dead since naturally works flow from faith. Our initial salvation is by faith, but to strengthen and grow in that faith is by works and faith increased.

A Christian can never lose salvation, for he is born-again, and those born-again "they shall never perish" (John 10.28). Whereas a Roman Catholic says he can lose salvation. These are two different faiths worshiping two different Christs.

The Roman Catholic has not given himself to the Jesus that once-saves-always-saved. Therefore, the Roman Catholic is going to Hell, because he forever rejects the Jesus that saves once and forever.

The Roman Catholic by his own strength attempts to keep himself saved because, admittedly, he does not give his life to the God who always keeps. Something can change where he can lose salvation and since that is dependent on him, it is by his own strength of self that he can renounce his faith and reject the Jesus he formerly gave himself to.

Whether this is a work or not in rejecting the Jesus he formerly gave himself, what is true is it was by his strengthen he renounces the Jesus he once believed in which is a good thing since now he is open to receiving Jesus Christ into his life for eternal life which is given once born-again.