What did Christ mean by those words (I paraphrase): “He who is without fault, let him throw the first stone”?
The end of your post became slightly confusing, so you might have put up this question not expecting an actual reply, but, I shall try to answer it anyway. Ha.
When Christ said this, he was confronting a group of Jews, Jewish leaders I believe, who were bringing forth a woman caught in the act of adultery, which is punishable by death by stoning. So, as these Jewish teachers and leaders were trying to trap Jesus and get Him to say something contrary to their laws, they said, “Teacher, this woman was caught in the act of adultery. In the Law, Moses commanded us to stone such women. Now what do you say?”
The thing was, in the Law of Moses, both the man AND the woman, who were caught in the act of adultery, were to be stoned, but they brought only the woman. So, He was turning it all around on them, and said, “If you have really come here to fulfill the Law of Moses, with a pure heart, you throw the first stone.” And, as we read, the elders left first, understanding that Jesus had uncovered their plot, and then the younger men left later.
Just thought I’d clear that up, I enjoy that passage.
Concerning Once Saved Always Saved:
It has been broadly covered above, but to reiterate, the OSAS idea is that Christ’s work on the cross was complete. It was whole. Once you’re saved, of course by His work on the Cross, you’re saved forever. True salvation. You can know and understand righteousness and salvation, you can know and understand that Christ died for you, but you don’t have to believe it. This is was most of the scriptures used above refer to. People who understand salvation, but never commit themselves wholly to it. And other scriptures referred to the saved that fell out away from where they should be, but never does it say they will go to hell.
To say that you can lose your salvation, says that you can do something to forfeit your salvation. This, in turn, must mean that you can do something to gain salvation. You can neither gain nor lose salvation. Christ’s work alone is sufficient to save you, and if Christ saves you, what can you do to overturn it?
One might say that it is a bit arrogant to claim you have the power to overturn what Christ has done in your life. I am sure none of you have that arrogance, and I don’t think anyone who understands salvation would make such a claim, but you understand the general idea.
So that is the basis of OSAS: You can do nothing to gain salvation, thus you can do nothing to lose it. So, once you’re saved, you’re saved to the bone. The works done are proof of your salvation, they are outward expressions of your inner change. If one lacks works, and lacks fruits, he more than likely lacks salvation.
Hope that helped.