From The Atlantic, January/February 2009, at 21:
Lots of people hear voices in their heads—but only some are bothered by them. One group of voice-hearers in a recent study, who considered themselves psychics or mediums, said they found the voices “benevolent” and were more likely to engage with them than resist them. Members of a second group, who had sought psychiatric help, found the voices “malevolent and omnipotent,” and suffered more stress and anxiety. Hearing voices may not be as problematic as what the voices are saying.