Michael Heim, teacher in philosophy at California State University, in his recent book «The Metaphysics of Virtual reality» he suggests that VR gives us a clue to the UFO experience because it represents the culmination of the artificial technology-driven world which we already inhabit, but have not yet assimilated. He suggests that «We still experience our technological selves as alien visitors. They are symbols of the ascent to a richer, more complete personal life - much like medieval angels. Jung saw the whole panoply of spiritual symbols recurring in the 20th century ... in the dreams and late night experiences of modern man.»