"In their native contexts these objects [i.e. primitive masks] were invested with feelings of awe and dread, not of esthetic ennoblement. They were seen usually in motion, at night, in closed dark spaces, by flickering torchlight. Their viewers were under the influence of ritual, communal identification feelings, and often alcohol or drugs; above all, they were activated by the presence within or among the objects themselves of the shaman, acting out the usually terrifying power represented by the mask or icon. What was at stake for the viewer was not esthetic appreciation but loss of self in identification with and support of the shamanic performance."
In many trance states people are more in touch, more observant [as opposed to less]. I remember an experiment in which deep trance subjects were first asked how many objects there had been in the waiting-room. When they were put into trance and asked again, it was found that they had actually observed more than ten times the number of objects than the consciously remembered.