The question as to whether or not a Christian can lose their salvation has been debated for centuries. And its raged for so long that as soon as you make one comment that seems to agree with one side or the other, you're immediately branded and pigeonholed as being a Calvinist or an Arminian (as if these are the only two choices).
Each side of course has its proof-texts, but what they both lack is the ability to provide an interpretation that satisfies all the verses in question without forcing you to choose one verse at the expense of another. This is one way you can tell that their interpretation is wrong as the Bible will never contradict itself, although there are paradoxes found within its pages - which are seeming or apparent contradictions.
Both lack any real knowledge of any major patterns and principles which further complicates the matter. This in addition to some basic Bible study mistakes that are made including the basic failure to understand proper context, a failure to read far enough ahead and far enough after a particular verse or passage.
Once Saved Always Saved (OSAS), eternal security, and the security of the beleiver are frequently used terms
| || 2 Peter 2:20-21 ||
"For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein,... For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them."
| || Hebrews 6:4-6 ||
"For it is impossible for those who were once enlightened,... If they shall fall away, to renew them again unto repentance;..."
| || Hebrews 10:26-33 ||
"For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries... "