Hi Vineeto,
So I have been looking at this the past few days and it seems to me that there are no spiritual beliefs or fantasies masquerading as the truth.
All that I am able to locate is that very “intuitive ‘presence’ which is the instinctual passions in action”, the impression of being present and existing over time as an ‘entity’.
I have had this phrase on my mind alot though - ‘my’ immortal soul… Because if ‘I’ did not somehow experience ‘myself’ to be immortal then why not allow ‘my’ extinction right now?
Running those questions which you suggested :
Perhaps some new, non-spiritual, down-to-earth, actual questions regarding your concept/ idea of ‘your’ perception of the universe can reveal some sensible replies –
Is it infinite?
Is it physical?
If so, where in infinite space do the immortal souls reside?
Where does the devil (from your Supernatural fiction movie) physically reside?
Where do the dead reside from where the brother of the protagonist is brought back from the dead?
Where is hell located?
All that comes up is that there is not even space for ‘my’ soul, that ‘my’ ‘being’ can only have an illusory/delusory existence.
Is it that because ‘I’ feel/believe ‘myself’ to be genuine that ‘I’ remain? That weight of ‘being’ it requires belief in order to sustain it. The ‘drama’ requires a ‘believer’, in fact they are one and the same thing.
This is all I can find here.
Just to add to the above, it is that impression of being present and existing over time as an ‘entity’ which is the source of ‘my’ belief in immortality. Belief doesn’t seem quite right here as ‘I’ don’t actually believe that ‘I’ will persist after this body dies, it’s more like a fundamental impression.
Aaand to add some more 
, I remember when I first read Richard’s writings years ago I thought “why on earth would ‘he’ have given up immortality for actual freedom”, immortality seemed precious. Whereas now this is the other way around, in that ‘I’ am happily searching for a way to become extinct, ‘my’ immortality has been exposed for what it is - suffering, and it is the possibility of ‘my’ extinction which is now precious.