Are you saying that a person could have been decieved by a false securtity in Christ? I don’t believe that is possible. The heart is decietful above all things. We can fall for certain lies, that is true. I just can’t see having the experience I had, ever thinking that Christ had not saved me. Salvation for me was getting out of a swamp that was thick mud and every step was a burden, never seeing more than a few feet ahead, and always, always dark, then August 8, 2005, I woke up to have Christ being at the wheel. Able to see myself as no longer a slave to sin, but free to follow Christ. Not everyone has a date like this, but God knew I needed to have that unquestionable salvation.
I don’t think I answered your question though. I would have to say that not everyone who says they are a Christian by word and deed, is truely a Christian. When we begin to be percicutted for following Christ, you will have a much better picture of who the real Christians are. Until then, we can only judge by the fruit of those who claim to be Christian.