If the deeply devout seem less self-doubting than others, perhaps it’s because religion helps them shrug off mistakes. So say researchers who found religious people exhibit lower activity than non-believers in a brain region linked to anxiety when erring on a simple test… The students with strong religious beliefs, as measured by their agreement with statements such as “My religion is better than others” or “I would support a war if my religion supported it”, exhibited less ACC activation than students with less fervent beliefs…
http://www.newscientist.com/article/dn16789-religious-people-less-anxious-brain-activity-shows.html