Psychoactive plants that induce a form of altered states of consciousness (hallucinogen-induced ASC (H-ASC)) have been widely used during the religious rituals of many cultures throughout the centuries. Some of the psychoactive ingredients of the plants that were used during these religious rituals were opium, cannabis (tetrahydrocannabinol), psilocybin, mescaline, ibogaine, dimethyltryptamine, Peganum harmala, bufotenin, muscimol, thujone, ephedra, mandragora, Salvia divinorum, etc. The main purposes of these plants were spiritual healing; to contact with spirits; to contact with the souls of ancestors; to reach enlightenment (Nirvana or Satori); to become a master shaman, pagan, or witch; and to reach so-called-other realities. In most of the ancient religious rituals such plants were consumed as a part of the traditional shamanic or pagan culture for many centuries and most of the religious figures and images in the ancient and modern religious systems are a result of these hallucinogenic substances and H-ASC mind states.