the subconscious mind is stil in uncharted territory.
in much the same way you see green when banged on the head, you could very well see white when near death.
i think a lot of people are too happy to give up knowldge for some heebyjeeby story - i mean, in bygone years anything that couldn't be explained (like infant mortality, the rainbow, why fish don't need air) was just put down to "God's will".
the want to believe we are not alone is a driver in many alternate realities, like seeing ghosts, out of body experiences, faith etc. not that it's the ONLY driver, but generally those that exhibit traits of believing in spirits are also showing other common signs of faith based perceptions.
one thing that does confirm that there is 'something' is an animal's reaction. humans are so desensitised to their spiritual side (by that, i mean the quiet enjoyment of one's own inner thoughts and processes) that what we may miss, or feel slightly, an animal is seeing/feeling 10 fold in comparison.
example...why can someone think of someone else, and 20 seconds later the phone rings, and it's the person you were thinking about? it happens to me more times than i can count. sometimes i know a client is calling from the other side of the city as they're dialling, i end the phone conversation i'm on immediately and hey presto ... look who it is. i can't explain that.
is that sense of ESP or psychic connection actually there, or was it just a co-incidence the last 50 odd times it's happened? well, you can flip a coin and get heads 50 times in a row, it ain't likely, but i've seen double heads 11 times in a row at the casino at two up.
what about all those times i did think about it and it never eventuated? does that mean there really is nothing? or maybe the other person was distracted with another task?
you could fill the forum with what if's. if you choose to switch "it" off and ignore it, chances are your mind won't let you see what is there. however, i think too many people switch "it" on, and see everything for what it ain't.