The parable of the sower illustrates how things go with some who receive the word. This is not complicated and doesn't require us to overthink things. Like others here are saying, I also know a couple of people who came to faith and then fell away back into stone cold darkness and disbelief due to what I believe was shallow soil at the time. I don't think it means they still can't be restored and so I continue to hope and pray for them. It's a battle for souls to get saved and stay saved - the devil prowls around seeking who he may devour and we must not be complacent, but stay sober and alert and vigilant. We are in a war, that's for sure!.... and like any war unfortunately the reality is that there can be casualties.
The reassurances of scripture are mean to reassure us that Jesus has indeed the power, strength and authority to save us from wrath and from death - we need those reassurances to keep trusting in Him, especially when facing dire circumstances such as severe persecution etc, but it is conditional upon us remaining in Christ and continuing to follow Him. As much as those reassurances are needful, the fear of the Lord is needful too especially in times of temptation. We can't just live like the devil without sincerity towards God and expect to remain in Christ, God is not mocked. There are those He will spew out of His mouth.
Only God infallibly knows the hearts of people and who truly are and are not saved. Judas Iscariot looked like the real deal to the 11 remaining disciples but Jesus knew his heart and said, "
he is a devil!" (John 6:70-71) The Lord loves justice and does not forsake His saints; they are
preserved forever.. (Psalm 37:28)
In regard to the parable of the sower, in Luke 8:13, even though this shallow ground hearer is said to have "believed," he is never said to have been "saved." How do we know that the shallow ground hearer was never actually "saved?" I will give the reasons. First, his heart condition is
contrasted with that of the
"good ground" hearer, who's heart was
"good" and
"honest." Thus, his heart was not "good," being like the soil to which it corresponds, being
"shallow" or "rocky," lacking sufficient depth. Such soil represents a sinner
not properly prepared in heart.
People who "believe" and "rejoice" at the preaching of the gospel
without a prepared heart, and without a good and honest heart, and without having "root" in themselves, do not experience real salvation. Unlike saving belief, temporary shallow belief is
not rooted in a regenerate heart. How can
no depth of earth, no root, no moisture, no fruit, represent saving belief? It can't and it doesn't. Faith without works is dead.
IN CONTRAST TO - Mark 4:8 - But other seed fell on
good ground and yielded a crop that sprang up, increased and produced: some thirtyfold, some sixty, and some a hundred. Luke 8:15 says, But the ones that fell on the
good ground are those who,
having heard the word with a noble and good heart, keep it and bear fruit with patience. The rocky soil represents a person not properly prepared in heart so the seed planted ends up with a lack of "root" (lack of being firmly rooted and established).
The same Greek word for "believe" (pisteuo) is used in James 2:19, in which we read that the demons "believe" (pisteuo) "mental assent" that "there is one God," but they
do not believe in the Lord Jesus Christ (Acts 16:31)
and are not saved.
John has portrayed people who "believe" to some level or degree but are clearly not saved. There is a stage in the progress of belief in Jesus that
falls short of firmly rooted and established belief resulting in salvation. As we see in John 2:23-25, in which their "belief" was
superficial in nature and Jesus would not entrust/commit Himself to them.
Also, in John 8:31-59, where the Jews who were said to have
"believed in him" turn out to be
slaves to sin, indifferent to the words of Jesus’, children of the devil, liars, accused Jesus of having a demon and were guilty of setting out to stone and kill the one they have professed to believe in.
So there is no loss of genuine faith or salvation here and tose who are sealed with the Holy Spirit of promise are
sealed until the redemption of the purchased possession. (Ephesians 1:13-14) Praise the Lord!
:)
This is not about over thinking it. It's about properly harmonizing scripture with scripture before reaching our conclusion on doctrine which avoids contradictions in scripture.