From Psychology Today:
Serotonin, the brain chemical crucial to mood and motivation, also shapes personality to make you susceptible to spiritual experiences. A team of Swedish researchers has found that the presence of a receptor that regulates general serotonin activity in the brain correlates with people's capacity for transcendence, the ability to apprehend phenomena that cannot be explained objectively. Scientists have long suspected that serotonin influences spirituality because drugs known to alter serotonin such as LSD also induce mystical experiences. But now they have proof from brain scans linking the capacity for spirituality with a major biological element.
http://psychologytoday.com/articles/index.php?term=pto-3252.html
