Well, it seems to me that it takes a lot of faith in the power of God to believe He has the power to keep you and not lose you. To believe that if you stray He will find you and carry you back to the flock.
I totally believe He will come after those who stray.
I also believe, that when the heart becomes hardened, it is possible to turn away in a state of unbelief.
The scripture warns us of the deceitfulness of sin.
Those who practice, as a lifestyle, the gratifying of the sinful desires of the flesh, can become overcome by that sin.
Today, we call it
addiction.
An addiction forms from a habit, a lifestyle choice to obey the sinful passions of the flesh, whereby these become our master that we obey.
James teaches us the pattern -
14 But each one is tempted when he is drawn away
by his own desires and enticed.
15 Then, when desire has conceived,
it gives birth to sin; and sin, when it is full-grown, brings forth death.
James 1:14-15
When sin has time to grow and mature within the believer, who has become entangled again, it becomes full grown... and brings forth death.
This speaks of a sinful lifestyle that continues, as one who practices...
Look at what James says -
4 Adulterers and adulteresses! Do you not know that friendship with the world is enmity with God? Whoever therefore wants to be a friend of the world makes himself an enemy of God.
James 4:4
We choose of our freewill to become God's enemy!
Then we become hardened...
12 Beware, brethren, lest there be in any of you an evil heart of unbelief in departing from the living God;
13 but exhort one another daily, while it is called "Today," lest any of you
be hardened through the deceitfulness of sin.
Hebrews 3:12-13
again
16 Do you not know that to whom you present yourselves slaves to obey, you are that one's slaves whom you obey,
whether of sin leading to death, or of obedience leading to righteousness?
Romans 6:16
and again
19 Now the works of the flesh are evident, which are: adultery, fornication, uncleanness, lewdness,
20 idolatry, sorcery, hatred, contentions, jealousies, outbursts of wrath, selfish ambitions, dissensions, heresies,
21 envy, murders, drunkenness, revelries, and the like; of which I tell you beforehand, just as I also told you in time past, that those who practice such things
will not inherit the kingdom of God. Galatians 5:19-21
These are just a few of the clear warnings in the Bible about sin, and the choices we make, to disobey the Holy Command of the Gospel to repent.
The Lord gives us time to repent, He is patient and kind and loving, longsuffering.
He loves us and will never stop loving us... never the less, these warning exist in the scriptures.
Yet, those that have been deceived into believing the lie, and even teach others, that it is impossible for us to lose our precious salvation...impossible to die and go to hell as a born again Christian, no matter what we do and how long we do it, because God is somehow obligated to save us no matter what.
And all the scriptures that warn us...
well those don't mean we will lose our salvation... they say.
While they promise them liberty, they themselves are slaves of corruption; for by whom a person is overcome, by him also he is brought into bondage. For if,
after they have escaped the pollutions of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled in them and overcome, the latter end is worse for them than the beginning. For
it would have been better for them not to have known the way of righteousness, than having known it, to turn from the holy commandment delivered to them.
2 Peter 2:19-21
it would have been better for them not to have known the way of righteousness...
JLB