The essence is, salvation is a relationship with The Grace of God in Christ....but if salvation only comes after all that we can do, why even bother an ongoing forgiveness for sin, yet that is precisely what God teaches us He does when we start a relationship with Him. And that again is something of the essence of once saved always saved (OSAS).
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Worth a repost.
Sadly, as we have seen here, the LDS seem to think (and I did as well when I was LDS) that OSAS means that Christians think they can sin all they want and still be saved. It doesn’t mean that at all.
It is hard when I see anyone abandon their relationship with the Grace of God and moreso when they trade in grace for salvation by works.
The absolutel fidelity of God’s Character is such that once His Spirit comes to the Mercy seat for the human spirit, it is His Integrity which is at risk over our infidelity! He has promised to never leave us or foresake us ... and that means He will be faithful to change us, even if He must allow our infidelity to lead us to physical destruction. If we doubt that bargain, just look at Jimmy Swaggert. Our FRiend Normandy is in a perilous condition ...