Defending Losing Salvation

[FuegoPentecostes]

What are the best Bible verses and explanations that defend the belief that one can lose their salvation? Basic Pentecostal doctrine, I know, however I have always gone back and forth between "once saved always saved" and losing salvation.

I always just thought it was simple enough to say what God gives, He can take away, but many people think it's not enough. And Exodus 32, when God says He can erase people's name from the book. And the end of Revelation when God says He will take out their name from the book of life those who take away from His Word. And when God says He will vomit the lukewarm out, preferring one be hot or cold.
Being erased or taken out of the book of life would mean one was once there and now not, meaning they were once saved and now not, right? And being vomited out I was always taught means you were literally in the Body of Christ (the church) and now you're being thrown out.

These examples also knock the assumption that we are saying the devil takes away our salvation, which isn't the case. He may try and deceive us, but it's ultimately God who blots out, takes away, vomits out, etc.

Is there any other ways people defend the doctrine that one can lose their salvation? Does what I said make sense?

 

[bushinoki]

Fuego, I dislike the term "losing" salvation here. It's more like giving up salvation. Those who know the truth, but turn their backs on it are the ones who will have their name erased from the Lamb's Book of Life.

 

[Grafted In]

Many,many times I have clung to this portion of Scritpture When I doubt my salvation.
May it give you renewed assurance.

King James Version (KJV)
5 It is reported commonly that there is fornication among you, and such fornication as is not so much as named among the Gentiles, that one should have his father's wife.
2 And ye are puffed up, and have not rather mourned, that he that hath done this deed might be taken away from among you.
3 For I verily, as absent in body, but present in spirit, have judged already, as though I were present, concerning him that hath so done this deed,
4 In the name of our Lord Jesus Christ, when ye are gathered together, and my spirit, with the power of our Lord Jesus Christ,
5 To deliver such an one unto Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.
6 Your glorying is not good. Know ye not that a little leaven leaveneth the whole lump?
7 Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:
8 Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.
9 I wrote unto you in an epistle not to company with fornicators:
10 Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world.
11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolator, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.
12 For what have I to do to judge them also that are without? do not ye judge them that are within?
13 But them that are without God judgeth. Therefore put away from among yourselves that wicked person

Read and reread verse 5. Bill