Hi Ralph. I question whether a person could be sane and choose to burn in hell for eternity. Because that is what would be required for a person to "walk away from their salvation". Do you truly believe that a person who really believes the gospel could decide to trade this present life and all it affords in earthly desires for an eternity in hell!? This seems to me to be an impossibility. I must therefore conclude that this person who walked away from the faith never truly believed it, and indeed, doesn't believe he/she is choosing to go to hell. Without being clinically insane that is. And I believe in one of your other opinions you said you didn't think God would send an insane person to hell.
My reply is below:
You seem to take the seductiveness of sin lightly. We know that Adam was not going to hell before he chose to deliberately sin. What about King David? He was saved before he committed adultery and then murder... Were they both insane?
Also you can't tell me that I wasn't truly saved and yet walked away from Christ when I joined the Marine Corps. Nor can you tell me I was insane.
Now Adam, nor David, nor I chose to spend eternity in hell, but yet that is exactly what all three of us did, when we chose to sin. Praise God that He forgave all three of us too.
No I never sat down and decided I didn't want to follow Christ, in fact I can remember many nights coming home drunk and holding onto the curtain over my bed to keep the room from spinning, but I never forgot to ask for forgiveness just in case I died in my sleep. But you know what I had chosen to not follow Christ and my prayers were meaningless:
Hebrews 6:4-6 For in the case of those who have once been enlightened and have tasted of the heavenly gift and have been made partakers of the Holy Spirit,  and have tasted the good word of God and the powers of the age to come,  and then have fallen away, it is impossible to renew them again to repentance, since they again crucify to themselves the Son of God and put Him to open shame. [NASB-U]
See I am the picture of that verse. It was impossible for me to come to repentance because I wanted to live in sin. I wanted to also go to heaven, but I loved getting drunk and having unrestrained sex, etc... I wasn't insane, I was enjoying what I thought was fun and yet I tried to keep my toe in heaven. It was only after I hit bottom and God really got a hold of my heart that I was willing to give this life up and truly come back to repentance.
As that verse says, I was trying to put Christ to shame daily by claiming His sacrifice as atonement for my sins, while I deliberately continued to commit them. Not insane, by any means, but enticed by my own evil heart and the seductiveness of sin.
This is exactly what James is speaking about:
James 5:19-20 My brothers, if one of you should wander from the truth and someone should bring him back,  remember this: Whoever turns a sinner from the error of his way will save him from death and cover over a multitude of sins. [NIV]
But there are cautions for those who try to bring a brother back too:
Galatians 6:1 Brothers, if someone is caught in a sin, you who are spiritual should restore him gently. But watch yourself, or you also may be tempted. [NIV]
You can't wander from somewhere you were never at in the first place. And look at what Jesus said:
John 15:6 If anyone does not remain in me, he is like a branch that is thrown away and withers; such branches are picked up, thrown into the fire and burned. [NIV]
You can't fail to remain somewhere you were never at in the first place too.
Sorry, but your idea doesn't hold water. No God won't judge someone who is insane, but He will judge those who continue to sin, because they are not insane and they are choosing the world over Christ:
James 4:4 You adulterous people, don't you know that friendship with the world is hatred toward God? Anyone who chooses to be a friend of the world becomes an enemy of God. [NIV]
You can't become something you already are, and we are all born into this world as sinners and enemies of God, so only someone who has been saved can BECOME an enemy of God.
E-Mail Ralph (whose comments are in green)