The words mystic and mystery both derive from the Greek verb muein, "to close," usually referring to the eyes. On the one hand, those who haven't been initiated should avert their eyes. On the other, material "reality" should be occluded by the eyelids.
Evangelicalism and its biblical literalism has been successful partly because of its (partial, and fucked up) integration of mystical experience. There's no doubt that some of those glossolalligagging motherfuckers are faking it. But some of them are having authentic experiences, yet haven't been trained (disciplined) to tell the difference between an "angel" and a "demon," speaking fastly and loosely. Hence an authentic "religious experience," but one interpreted through a fucked-up teenage psyche fed materialistic delusions of grandeur by whichever programming device is most readily accessible.
Side note: Would recommend the documentary "Constantine's Sword"; if you have Netflix you can watch it online.