What makes fantastic declarations believable is, in part, the vehemence with which they're proffered. Again, in the world of spirituality as well as of pop psychology, intensity of personal belief is evidence of truth. It is considered very bad form - even abuse - to challenge the veracity of any personal testimony that might be offered in a twelve-step group or on a talk show, unless the testimony itself is equivocal... Whatever sells, whatever many people believe strongly, must be true.