Molecular biolgist Dr. Dean Hamer in his recently published book The God Gene: How faith is hardwired into our Genes explored this "sense", or feeling of a higher power, and has concluded that it could quite possibly be the result of a gene known as vmat2. This gene may be directly responsible for an inherited predisposition for spirituality. Dr Hamer narrowed his search for the suspected spirituality gene to nine specific genes known to play major roles in the production of monoamines. These chemicals include serotonin, norepinephrine, and dopamine, which regulate functions such as mood and motor control. A variation in a gene known as vesicular monoamine transporter, or vmat2 seemed to be directly related to how volunteers for Dr. Hamer's experiment scored on his self-transcendence test. Those volunteers with the nucleic acid cystosine in one particular spot of the gene scored higher than those with the nucleic acid adeniine in the same spot. A single change in a single base of the gene seems to be directly related not to the belief in God, but to the increased probablility that the individual will identify as spiritual. The results of Dr. Hamer's experiments are not wholly impressive, mainly because his work has yet to be repeated, and much of his analysis is transcendence; rather, it is a result of chemical signals.
Just found this interesting thought I might share it. Of course it is not scientifically proven but I found it interesting none-the-less. I have found that almsot all people i skydive with are spirtual in one form or another. Could it be they are addicted to a chemical that indcues spirituality? Adrenaline? Oh well just a thought.
http://serendip.brynmawr.edu/bb/neuro/neur...1/ahussein.html