We are justified and saved by our beliefs - in the amounts of our beliefs/faith. We must go on to full belief to be fully sanctified/born again.
We are justified and saved at the moment of belief. Sanctification, which does not affect our salvation status, is a lifelong process. You seem to lump the two together.
Getting in the WAY of Christ by being SAVED doesn't guarantee that a person will complete their sanctification/born again process. Whether a person completes the process of becoming holy and sanctified is upto the person's desires and faith. Not every person will desire to become a true son of God, so not every person will complete the process.
So Christ is not enough to be saved? It is not enough to have faith in Jesus? Seems like scripture states otherwise.
8 For by grace you are saved through faith, and that not of yourselves, it isthe gift of God,
9 not of works, lest anyone should boast.
9 Because if you confess the Lord Jesus, and believe in your heart that God has raised Him from the dead, you shall be saved.
10 For with the heart one believes unto righteousness, and with the mouth oneconfesses unto salvation.
11 For the Scripture says, "Everyone believing on Him shall not be put to shame."
If a person is earnest about becoming entirely sanctifed (born again), than God will finish the process in them.
For example: If someone is still sinning against God's known will, then this shows God and others that that person does not believe God's Truth fully, but is instead believing a lie instead.
No one can sin while believing God's Truth, but they can only sin by believing in one or more lies. If someone is still believing lies and sinning, then they are not believing in Christ, which is the Truth of God.
We are saved first, then the Holy Spirit works within us to change us to be Christ like. When the person accepts Christ as their Savior, they are saved, even if they are still a baby in Christ, still living partly in the world and still partly in sin. TO imply that one must be perfect before they are saved is not scriptural, for we will not be perfect until we are with Christ.
For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast. For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them.
Notice that works comes after salvation. This is a life long process, and an immediate process.
We also read that the difference is in how we live, not that we are sinless.
This I say, therefore, and testify in the Lord, that you should no longer walk as the rest of the Gentiles walk, in the futility of their mind, having their understanding darkened, being alienated from the life of God, because of the ignorance that is in them, because of the blindness of their heart; who, being past feeling, have given themselves over to lewdness, to work all uncleanness with greediness.
But you have not so learned Christ, if indeed you have heard Him and have been taught by Him, as the truth is in Jesus: that you put off, concerning your former conduct, the old man which grows corrupt according to the deceitful lusts, and be renewed in the spirit of your mind, and that you put on the new man which was created according to God, in true righteousness and holiness.
Notice how the Gentiles were blind in their hearts, given to lewdness, and to work all uncleanness with greediness? One cannot remain in this lifestyle if they are saved. The Holy Spirit will convict them of their sin.
We can see even clearer the differences between walking in the flesh and walking in the Spirit through Galatians 5:16-26.
I say then: Walk in the Spirit, and you shall not fulfill the lust of the flesh. For the flesh lusts against the Spirit, and the Spirit against the flesh; and these are contrary to one another, so that you do not do the things that you wish. But if you are led by the Spirit, you are not under the law.
Now the works of the flesh are evident, which are: adultery, fornication, uncleanness, lewdness, idolatry, sorcery, hatred, contentions, jealousies, outbursts of wrath, selfish ambitions, dissensions, heresies, 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.
But the fruit of the Spirit is love, joy, peace, longsuffering, kindness, goodness, faithfulness, gentleness, self-control. Against such there is no law. And those who are Christ’s have crucified the flesh with its passions and desires. If we live in the Spirit, let us also walk in the Spirit. Let us not become conceited, provoking one another, envying one another.
IN the above, what keeps one from being saved? It is the "practice" of such lifestyle, meaning to continue to live in them, not by committing them one or twice is weakness. You are placing a yoke upon people that is not there.
In the Greek, the work prassontes (G4238) is used, where the KJV turns it into "those which do such things", giving the spin that they mean even once. The Greek word means to perform repeatedly, not once. Here is what a Greek dictionary tells us about the word parassontes:
To do, make , perform in general, expressing an action as continued or not yet completed, what one does repeatedly, continually, habitually.
Here is the regular differentiation from the English dictionary:
1.habitual or customary performance; operation: office practice.
2.habit; custom: It is not the practice here for men to wear long hair.
3.repeated performance or systematic exercise for the purpose of acquiring skill or proficiency: Practice makes perfect.
4.condition arrived at by experience or exercise: She refused to play the piano, because she was out of practice.
5.the action or process of performing or doing something: to put a scheme into practice; the shameful practices of a blackmailer.
You see, it is the continuing action, unwilling to change, that is the separating factor, not the once or twice weakness that we all go through. To say one must be sinless to be saved is not true. It is our hearts that God judges, more than our actions.