It seems that if the parietal lobe of the brain is deactivated through drugs or stimulation then our sense of self is deactivated too. That portion of the brain is what gives us a three-dimensional sense of the body and its orientation in space. Without that orientation, we are suspended in an ecstatic, almost transcendental state, and the boundaries that usually separate us from the world around us, disappear. As in transcendental meditation, we think we may have discovered another reality, or at least transcendended this one. So, this spiritual transformation is really a physical change, or the result of one, whether self induced or chemically induced. As they recently determined that alcoholism is the direct result of a gene that establishes the proclivity for it, perhpas spirituality will also be determined to be the result of a gene that stimulates the supression of the parietal lobe and makes us feel at one with the universe, makes us believe. So who are we really? What remains sacred for us? Is my yearning for meaning just my genetic proclivity for the divine, and nothing more?