Sanji is not sure he has truly lived. Even assuming that he was about to die, he had no intention of thinking about what had kept him alive for so long.
If he had to die as a baby, he would not have lived at all, and he would not have been aimlessly fretting and letting time wander endlessly and dangerously.
If there really is some kind of absolute spiritual existence, Sanji will confirm that he is indeed controlled by some inexplicable external force that supports life, alone and doing nothing. He often suspected that he was tortured by this evil curse, until all that was left was his twisted body, and Sanji was alive in this body in some way that was not alive.
Conception: