Luke 8:13 - “Those on the rocky soil are those who, when they hear, receive the word with joy; and these have no firm root; they believe for a while, and in time of temptation fall away. NASB
There has been much discussion of what Jesus meant in this verse. Some believe that the meaning of "fall away" means to fall away from salvation. The rationale being that they believed for a while, and therefore, are only saved for a while. The point being that one is saved only as long as one continues to believe.
However, others (including me) believe that "falling away" refers to "for a while". IOW, Jesus is just noting some who believe, and are therefore saved, but because of testing/temptation, they fail to continue to believe. Therefore, they only believe for a while, or, they "fall away" from their faith.
So, which view is correct? The only way to determine what "fall away" means is to look at the Greek word and its meaning.
The Greek word for "fall away" is a single word, "aphistemi". Here are the various ways it can be translated:
induce to revolt, withdraw, to desist or refrain from, to make defection, fall away, apostatize, to abstain from.
The form found in Luke 8:13 is a present tense, middle voice. The middle voice is instructive, and indicates that the action of the verb (fall away) is produced by the subject on the subject.
For more information on the voice, see
http://www.artsci.wustl.edu/~cwconrad/docs/UndAncGrkVc.pdf.
Further, my Greek lexicon indicates that specifically in Luke 8:13, it carries the meaning of "to make defection, fall away, or apostatize".
These meanings eliminates any sense that "fall away" means to lose salvation. First, we all know that humans don't produce our own salvation. And the middle voice shows that it is we ourselves who do the falling away.
So, if falling away were to refer to loss of salvation, as some claim, then that would indicate that we participate in our own salvation, which is contradicted completely by Paul in two passages: Rom 4:4,5 and Eph 2:8,9.
IOW, we cannot save ourselves, nor can we "un"-save ourselves.
So, the meaning of "fall away" in Luke 8:13 indicates that one simply ceases to believe. Without any indication of loss of salvation.
Please note that there are no verses anywhere in Scripture that tells us that one can lose salvation. None of the "warning verses" says so either. Those verses do warn believers, but it is not about loss of salvation.