So one must love their fellow man in order to be saved? So much for sola fide, I guess.
That is why Paul said "there remain these
three: faith, hope and love: and of these
love is the greatest." There are two types of faith: feigned faith, and, unfeigned faith; just as love is feigned, or, unfeigned. Now, we know that faith alone cannot save (this is feigned faith) as James writes: James 2:14-16. Many wrestle the words of James here (and so with Paul, "unto their destruction") as if James is speaking of "rule-keeping" works, but James is clearly talking about works of unfeigned love and faith, and not "keeping rules": we see how James immediately connects the idea to helping someone in need, not to "rule-keeping": what good is faith that doesn't show love to others in their time of need? It is worthless: it is
feigned: it is "robotic": it is not "of the Spirit"; so John also writes the same: 1 John 3:17-18. You see? James is speaking of "unfeigned faith" (1 Timothy 1:5, 2 Timothy 1:5) while John speaks likewise of "unfeigned love" (2 Corinthians 6:6, 1 Peter 1:22)
Of these works of unfeigned faith, James cites Abraham's show of faith in offering Isaac his "only begotten" full well in perfect faith in the promise of God that Isaac
would not die (Hebrews 11:17-19), and Rahab who obeyed no "rule-keeping" but in faith of the promise, hid the spies of Israel. None of these things of which James speaks have anything to do with "works of the flesh/law" in that none of them are "rule-keeping": they are each three works following from unfeigned faith and love. Such is of the Holy Spirit and cannot help but produce fruits of the spirit.
Why should it matter though? I keep hearing that once one is saved, it's permanent. Who cares if someone loves, hates or is ambivalent about his fellow man?
God is the one that cares.
Which is it? Does one need only to profess the faith so as to be saved? Or is salvation somehow conditional upon conduct? Is there perhaps some third alternative at play?
There is a third alternative: unfeigned faith and love will produce fruits following, and salvation is conditional on unfeigned faith and love. Feigned (or, dead; without the spirit; "robotic") faith and love are useless: 1 Corinthians 13:1-3
If one is capable of pronouncing a saving faith, surely it follows that they can change their mind later.
No, love
never fails: if what a person experiences "fails" then it was not unfeigned to begin with. Remember the parable of the sower? Those who "fail" had no root; their love was shallow and could not remain when "shaken": if you want to see who is manifesting unfeigned love of God, look for the ones whose love
never fails and you will find the ones who are saved.
Ergo, is it not possible at least in theory that someone can profess a genuine saving faith in God today and then abandon it tomorrow?
No, it is not possible. It is possible that there are those that "anon with joy receiveth it; Yet hath he not root in himself, but dureth for a while: for when tribulation or persecution ariseth because of the word, by and by he is offended" and that there are those that "the care of this world, and the deceitfulness of riches, choke the word, and he becometh unfruitful." Unfruitful means "feigned" as their love of the world made manifest: Matthew 6:24: and then there are those that "heareth the word, and
understandeth it; which also beareth fruit, and bringeth forth, some an hundredfold, some sixty, some thirty." These are the only three types of ground that receive seed. Note the critical use of the words "understand it" because it is usually that the former two "feigned faithers" never understood the Word to begin with; thus, no "root" and when "shaken" "wither away" - and in that withering away is made manifest that they
never knew Him to begin with: 1 John 2:19. I'm sure there are many people who
thought they had genuine faith in Christ; but their faith was rooted in a lack of understanding; and any man who "loses faith" never had understanding capable of allowing knowledge of Christ to begin with, otherwise his love would
never fail.
So far though, sanctification has been the hot potato people don't seem to want to touch. It's rather mystifying.
How so? Christ is our sanctification: 1 Corinthians 1:30; and by Him we are sanctified, putting no confidence in ourselves: Ephesians 3:12, Philippians 3:3, 2 Corinthians 3:5