Let's think about this in a non-inflammatory way. consider this theory.
It is my own belief.
My theory: It's all true in some respect.

Basically this is a half-religious, half-pseudo scientific way of saying we could all be right and it is all a big piece of the puzzle. Many people believe that we have souls which reside in another plane of existence and come from this plane of existence to be put into human bodies. Well think about it. If these "souls" as we call them come from some other plane of existence, chances are they aren't carbon based, and probably aren't even visible. If a soul were to try and communicate with other souls -- would they use their mouths? No, they wouldn't.They probably don't even have mouths. And until we have the ability to explore other dimensions then we will never find evidence of this but one thing is for certain.. they would use some other form of communication. Non verbal communication in some spiritual or mental way. If a soul were to say, be born into a human body for whatever reason, then the only connection between the soul and the world we see before us is the brain. However the brain is to the soul is like beer goggles to your eyes... everything would be muddied and discolored; and the body is the vehicle the brain controls to move around, but compared to a being comprised of energy it would be ... clunky to say the least.
Seeing as how we have the most advanced brains of any animal in the world, the connection between our consciousness and personality (soul) would be alot better than any other animal in the world. Music, beauty, art, poetry.. No other soul-vehicle perceives these things but the human model because has the least muddying lens to look through. Human beings who accept they they are their own vehicles tend to worry about more materialistic things. now, if someone were to realize that connection through some way or another, than they could theoretically break it, causing astral projection. If telepathy, psi and other phenomena are spiritually (not religiously) related, then it would require an extra dimension of study to cover for the inadequacies of our own minds...