My original thought was that the OSAS (once saved always saved) teachers agreed what salvation is and therefore I had no real disagreement with them. But then I began to understand more and more of what was really being taught and realized that this doctrine has eternal consequences, or in other words does impact a persons salvation.
I want to quote a few comments which show why I am concerned about this doctrine, and for that matter show what the doctrine really is. I am not going to attribute any of these quotes to any person here, but they were all made by well known Christian leaders.
And so, sometimes out of ignorance or whatever it might be, they attempt to gratify and meet those needs the same way they did before they were saved, and therefore, you can't tell a carnal believer from a lost man.
As far as overt behavior is concerned, a carnal believer cannot be distinguished from an unbeliever.
... believers who lose or abandon their faith will retain their salvation...
Where is this place represented by the "outer darkness" in Jesus' parables? To be in the "outer darkness" is to be in the kingdom of God but outside the circle of men and women whose faithfulness on this earth earned them a special rank or position of authority.