man looks at the outward appearance, god looks at the heart.
the idea of "once saved always saved" is true. the problem lies in determining whether or not one is saved. this is never a problem for one who IS saved because they no longer think that way.
trust yourself. if one thinks they have a problem with salvation from death of the body, they probably do. and anyone who walks around declaring they are saved are mistaken. the bible makes it clear that it is those who endure to the end who are saved.
ever hear of the good news? the good news is that sin is not the issue. that is the gospel(good news) of christ(the annointed). jesus made a way and then said follow. few do.