“Sin will not keep you from the Grace of God but the Grace of God will keep you from sin.”
If we can lose our salvation once we are saved, then it means that our salvation has something to do with our obedience and our faithfulness. But this is false teaching, because our salvation is 100% secured by the work of Jesus on the cross.
If I teach “Once saved, always saved” does this mean that we can sin as much as we like? That it doesn’t matter? Where did I say that? Some argue that Grace teaching brings people into a licence to sin. No way! Because the Bible says: “Sin shall have no dominion over you, because you are not under law, but under Grace.”