Psychedelic drugs, especially psilocybin, allow a searchlight to be thrown on these deeper levels of the psyche, as Jung correctly stated. But it is not a museum of archetypes or psychic constructs, as he seemed to assume. It is a frontier of wholeness into which any person, so motivated and so courageous as to wish to do it, can go and leave the mundane plane far behind.
Terence McKennaWe can no longer have forbidden areas of the human mind, or cultural machinery. We have taken upon ourselves the acquisition of so much power that we now must understand what we are. We cannot travel much further with the definitions of man that we inherit from the Judeo-Christian tradition. We need to truly explore the problem of consciousness.
Terence McKenna