In addition to natural mind enhancing supplements, McKenna spoke on the subjects of virtual reality (which he saw as a way to artistically communicate the experience of psychedelics), 'techno-paganism,' artificial intelligence, evolution, extraterrestrials, ancestor-worship (or, as he put it, contacting 'dead people'), and aesthetic theory (art/visual experience as 'information,' hence the significance of hallucinatory visions experienced under the influence of psychedelics). He advised the taking of psychedelics in relatively-to-extremely large doses (asserting that those who had only sampled psychedelics in small doses failed to access their full potential), particularly alone, in a dark space, without music or other forms of external stimulation. Philosophically and religiously, he expressed admiration for Marshall McLuhan, Pierre Teilhard de Chardin, Gnostic Christianity, and James Joyce (calling Finnegans Wake the best literary representation of the psychedelic experience). He remained opposed to all forms of organized religion or guru-based forms of spiritual awakening. He believed DMT was the apotheosis of the psychedelic experience and spoke of the 'jeweled, self-dribbling basketballs' or 'self-transforming machine elves' that one encounters in that state. Although he avoided giving his allegiance to any one interpretation (part of his rejection of both monotheism and monogamy), he was open to the idea of psychedelics as being 'trans-dimensional travel, literally,' enabling an individual to encounter what could be aliens, ghosts/ancestors, or spirits of the earth.