My experience with those who claimed to be "annointed" was that they were very definitely affected by mental illness. One in particular that I can think of still requires intensive psychiatric treatment, 30+ years after first "partaking of the emblems."
Those who regularly work with the mentally ill are generally in agreement that mental illness has number of common characteristics. One of these is deep religiosity, and another is having delusions of grandeur. Not, of course, that all religious people are necessarily mad! However, religion together with mental illness is not a good combination.