The issue is born again of the Holy Spirit, or not. When it clicks there are fake Christians in all congregations, that Bible sermons are to a mixed congregation of virgins with and without oil in their lamps, the latter being repeatedly and fairly warned to repent, the fact of wheat and tares, and the unrepentant in all congregations; that there are those the Lord does not really know who profess Christ, but do not possess Christ, that is, the Spirit of Christ, then all will become clear as to why there are warnings in scripture, which you will even see in such as the structure of pronouns, like a "they" versus "you" in such as Hebrews 6.
Those who proclaim temporary eternal life, getting unborn again or unsealed, do not understand scripture nor even trust God, therefore should spend less time on message boards and more time learning what they're trying to comment on, at which point they may begin to speak of trust and faith in the Lord, instead of voicing doubts that reveal their lack of any strong faith in the very promises of God. Also, if you are led of the Holy Spirit, you KNOW God, and are SURE in that knowledge of the One living in you, and a clear understanding of what is, actually, basic, baby's milk doctrine in scripture many of you dispute over, all day long, only demonstrating you're wallowing in error over the very basics of saving faith, basics many children in Sunday school understand, better than you do.
For now, you naysayers would do well to stop making fools of yourselves and demonstrating to everybody with eyes to see you don't really understand the word of God.
OSAS: 101 Bible Reasons Proving Eternal Security