Marcel Eliade took the position that hallucinogenic shamanism was decadent, and Gordon Wasson, very rightly I believe, contravened this view and held that actually it was very probably the presence of the hallucinogenic drug experience in the life of early man that lay the very basis for the idea of the spirit.
Terence McKennaWe are part of a symbiotic relationship with something which disguises itself as an extra-terrestrial invasion so as not to alarm us.
Terence McKenna