As is often the case, the ideas for writing a book comes from discussions with fellow believers. This book is no exception, except to say that the logical conclusion to the debate we had would mean that either party isn't a believer! That is, if I believe strongly in the concept of 'Once saved, always saved' (OSAS), and others do not, how could it be considered a secondary matter, rather than a primary one. It is either true or it isn't. If I live my life as a believer of this concept and promote it as being true, and never question it, how would I know if I am one of the ones that my fellow believers say won't make it to a blissful afterlife? The idea of 'wilfully sinning' keeps raising its head as being the main rationale why some Christians will be heading for Hell, yet as this offering hopefully shows, that is a statement which itself needs to be debated. The 'discussion' could have become rather heated, for neither side would 'back down', which is rather an odd situation, for I believe that this is not a secondary issue, for if those who believe in the statement are wrong, there could be additional billions going to Hell - Christians that is, who will join the many other billions who genuinely want nothing to do with God. 'The bible says so' was another phrase being used to defend the opposing argument, but as we shall see this is not a solid argument, for there are verses that each camp could use to defend their stance. As with any scriptural issue there must surely be one answer; 'agreeing to differ' is not an option in this case, for if we firmly believe that Christians can lose their salvation, there must be millions if not billions of believers who are either ignorant of this debate, but if true, will go to Hell, or they are not ignorant but feel unstable, unsafe, and afraid that their lack of perseverance will send them to Hell. Either way, the discussion led to me writing this small book.