After coming across one of John MacArthur's talk on salvation for suicide, I looked into another preacher's take on such topic.
MacArthur, like his take on infant salvation, easily opened to the possibility that one could be saved if one is a "true" christian, even after suicide.
Dr. Stephen Tong's answer on this subject is basically: No. Based on one of his talk I found online...seems to be from an only source, so I pasted here (as comment), in case it gets taken from there. I believe the source but I wish I knew more of the authenticity of it. I have indicated the pertaining subject with a ### ruler but copied the entire article just so that it is better than less.
And after reading John MacArthur's answer to the subject, I'd ask "a true Christian would commit suicide in a time of extreme weakness"? and re-emphasize his statement: ...But we question the faith of
those who take their lives or even consider it seriously--it may well be
that they have never been truly saved."
Granted, suicide and murder can be equivalent making it also a sin, but Colossians 2:13-14, Romans 8:38-39 & Jude 24 don't justify a "true christian" to be in a condition of such extereme weakness that they commit suicide, because although all forgiven sins could include future sins or nothing could separate believers from God's love or the protection against stumbling block, it cannot justify something lack of repentance (unless of course, one might argue one is given a chance to 'repent' the second before death, to which I could only say only if it's genuine which most of us are easily be fooled of), I can tell MacArthur also attempted very seriously in explaining the sinful act of suicide.
I notice John MacArthur occasionally seems to 'over-emphasize' on comfort. Not that he's like the other self-proclaiming of having great love christian psychiatrists. But I fear he sometimes approaches these things from an emotional state and then into scriptures later. I conclude this based on his take on infant salvation...but I haven't finished his book "Safe in the Arms of God" yet.
As for some slightest justification of suicide, my conclusion is: No matter how in a time of extreme weakness one is suffering (though God will never burden one more than one could bear), one can never justify one's suffering greater than Jesus'. And if Jesus didn't commit suicide...