The Doors of Perception/Heaven and Hell

by Aldous Huxley

A person under the influence of mescalin or lysergic acid will stop seeing visions when given a large dose of nicotinic acid. This helps to explain the effectiveness of fasting as an inducer of visionary experience. By reducing the amount of available sugar, fasting lowers the brain’s biological efficiency and so makes possible the entry into consciousness of material possessing no survival value. Moreover, by causing a vitamin deficiency, it removes from the blood that known inhibitor of visions, nicotinic acid. Another inhibitor of visionary experience is ordinary, everyday, perceptual experience. Experimental psychologists have found that, if you confine a man to a “restricted environment,” where there is no light, no sound, nothing to smell and, if you put him in a tepid bath, only one, almost imperceptible thing to touch, the victim will very soon start “seeing things,” “hearing things” and having strange bodily sensations.