DD,
You will have to excuse me. When I got home last night, I simply forgot that I needed to address this further. I believe that I may have misspoke on this one, so let me attempt to extricate my foot from my mouth. I do not believe in the rapture as it is commonly defined within evangelicalism. I believe that all humanity will be given a spiritual body and with that body they will either experience an eternity with God or eternit apart from Him. There for the rapture and resurrection have morphed into one event. I apologize if I was not clearer before.
If you mean, "once saved always saved no matter what you do " then there is a problem.So, what's the problem? If someone is saved, they're not going to try to sin even more.
The problem is that the Bible never teaches that grace gives us a license to sin. However, the Bible being written to be applied in the real world, tells that when we do sin we have an Advocate. We can try asll we want not to sin, but we still sin. Maybe not in deed (rarely), but primarily in word or thought.
Also remember the context of that statement. Gaiagirl had made a statement about someone professing faith in Christ, and then robbing banks, or some such folderol, and invoking the above mentioned statement. The issue is not the momentary falling into sin that makes one's salvation unsure, but rather the continued practice of it. OSAS, is unbiblical, and not what was meant by the Reformed doctrine of the perserverance of the saints.