In the hope of vanquishing the false teachers who prowl the internet hoping to lead the faithful and the seekers of Christ astray, please consider all of
Romans 8. Linked here
For those who are not Christians as yet, for those who are seekers of the way, when you come across those who attempt to demean Jesus and his promise, after his sacrifice on the cross, of eternal life, eternal salvation by the grace of God the father, challenge them and their agenda.
Ask them to show you the scripture where Jesus himself, not Paul, not Peter, but Jesus himself said that the gift of Salvation is not eternal. That he will repeal it at his whim.
You'll be waiting for a very long time for that false teacher to bring that scripture to you. Because what you are asking them to do is to show in scripture what they profess of Christ. That he is a liar when he, the only begotten son of God, died so as to take the sins of the world upon himself on the cross so that whosoever believeth in him shall have
eternal life. Salvation is not revocable.
When you were a sinner and sought to be redeemed and washed clean in the blood of the lamb, Jesus, you became a new creature by the grace of God.
How then can you take that grace, as one of those sheep Jesus said would hear his voice, and did, and that he knows you by name did make that call to your spirit to come unto him and repent and be saved, then choose to revoke the grace of God's gift to you? How do you, a mere mortal, have greater power and authority than the king of heaven? That you, per those who condemn OSAS, can tell Jesus, who said you were one of his sheep that he knows by name, renounce him and the grace of God by your own choice? And thereby damn yourself back to the sinner and the appointed destiny that awaits the unredeemed?
That would make you more powerful than our all knowing God.
Further, those who renounce the fact that once we're saved we are always saved, are living under the delusion, and this is what prompts their false argument, that once you're saved it isn't eternal because if you sin you're not saved anymore. And that's why they think OSAS is false. Because they believe, and this because they have never read scripture, OSAS is a license to sin. Because being saved nothing you do can ever cause you to be found guilty of sin and suffer the consequences that would otherwise occur when someone is an unrepentant unredeemed sinner.
No one lives without sinning. Not even the redeemed in Christ. Those that renounce OSAS don't know what sin is. Mores the pity because as they argue and call Jesus a liar and don't know the basics about sin and redemption, they revoke any argument they make due to that ignorance of the definition of the sin that Jesus redeemed in the first place.
Those who are saved in Christ sin. It is impossible to be human and not. However, by the grace of God our sin will not condemn us as it would those who are not reborn. That's scripture too.
(What Does The Bible Say About Once Saved Always Saved - Scriptures)
John 10:27-30 My sheep hear my voice, and I know them, and they follow me. I give them eternal life, and they will never perish, and no one will snatch them out of my hand. My Father, who has given them to me, is greater than all, and no one is able to snatch them out of the Father's hand. I and the Father are one.”
Bible Study Tools - Sin - Definition
Now for those who are seekers, or are Christian and may be made afraid by the false teachers on the internet who attempt to tell you your salvation is not eternal, consider what they are saying to you as they plagiarize Christ and interpolate his words to their agenda there in John 10:27.
This is what they're saying to you in the name of Christ. (They're lying! And what they're saying is blasphemy and heresy. But this is what they're saying so as to repeal Christ's words and interject their own:
John 10:27-30 My sheep hear my voice, and I know them, and they follow me. I give do not give them eternal life, and they will never perish, unless they decide to do so. And no one but themselves will snatch them out of my hand. My Father, who has given them to me, is greater than all, and no one but your own selves are able to snatch yourselves out of the Father's hand. I and the Father are one.