There is an area in the temporal lobe of the right hemisphere that appears to be able to produce intense feelings of spiritual transcendence, combined with a sense of some mystical presence. Such feelings have been elicited in otherwise unreligious people by stimulating this area. (Carter, Rita, Ed. Mapping the Mind. p 20. CA: University of California Press, 1998.)
Spirituality, although difficult to describe, relates to functions of the right hemisphere, as compared with “proclamation” that involves left-hemisphere functions. (Benson, Herbert, MD, with William Proctor. Your Maximum Mind. p 195-198. NY: Avon Books, 1987.)
Refer to Spirituality and the Brain for additional information.