"And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book."
-Rev 22:19
That verse indicates that someone whose name was in the book of life can be easily removed. Call it God's pencil and eraser if you like, but it is what it is.
And again...
"He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels."
- Rev 3:5
This indicates that He could indeed "blot out his name", though will not do so to "he that overcometh".
Pencil and eraser? Call it what you wish. It is what it is.
And again...
"Let them be blotted out of the book of the living, and not be written with the righteous."
- Psalm 69:28
For something to be "blotted out" then it had to exist there before.
There's God's eraser again, tending to the Book of Life.
Oh wait, here it is again...
"And the Lord said unto Moses, Whosoever hath sinned against me, him will I blot out of my book."
- Exodus 32:33
There's more, but let's move on...
This is a war for souls that we are in. You believe that simply because you said the sinners prayer at 14 that your salvation is assured and Satan gives up then on destroying your soul. The body of scripture in its entirety however clearly contradicts this mistaken belief.
There is venial sin which warrants only temporal punishment, and then there is mortal sin which separates us from God, kills spiritual life, and is only forgiven through true repentance, confession, and contrition:
"If any one sees his brother committing what is not a mortal sin, he will ask, and Godwill give him life for those whose sin is not mortal. There is sin which is mortal; I do not say that one is to pray for that. All wrongdoing is sin, but there is sin which is not mortal."
1 John 5:16
Here is the blessed St. Jerome commenting on this [A.D. 393]..
"There are venial sins and there are mortal sins. It is one thing to owe ten thousand talents, another to owe but a farthing. We shall have to give an accounting for an idle word no less than for adultery. But to be made to blush and to be tortured are not the same thing; not the same thing to grow red in the face and to be in agony for a long time. . . . If we entreat for lesser sins we are granted pardon, but for greater sins, it is difficult to obtain our request. There is a great difference between one sin and another" (Against Jovinian 2:30 [A.D. 393]).
In spite of a mountain of biblical scripture which clearly contradicts the false doctrine of "once saved, always saved". OSAS is false teaching and heresy. Lean not on your own understanding.
You should read all of it then, not just the part that appeals to your personal beliefs...
"Do your best to present yourself to God as one approved, a worker who does not need to be ashamed and who correctly handles the word of truth. Avoid godless chatter, because those who indulge in it will become more and more ungodly. Their teaching will spread like gangrene. Among them are Hymenaeus and Philetus, who have departed from the truth. They say that the resurrection has already taken place [spreading false teachings], and they destroy the faith of some. "The Lord knows those who are his,” and, “Everyone who confesses the name of the Lord MUST turn away from wickedness.”
1 Tim 2:15-19
Early Church writing. First generation after Christ [A.D. 70].
Didache:
"Watch for your life’s sake. Let not your lamps be quenched, nor your loins unloosed; but be ready, for you know not the hour in which our Lord comes. But you shall assemble together often, seeking the things which are befitting to your souls: for the whole time of your faith will not profit you, if you be not made complete in the last time" (Didache 16 [A.D. 70]).
Justin Martyr:
"Eternal fire was prepared for him who voluntarily departed from God and for all who, without repentance, persevere in apostasy"
(Against Heresies 5:26 [A.D. 156]).
May the peace and grace of our Lord Jesus Christ be with you, savedsince14.
Maynard