I have intentionally grouped these plants by molecular type, as their common effects are traced to key bioactive molecules, which because of their specific interaction with neurotransmitter receptor proteins cause their profound effects on consciousness. Thus one can consider that it is the quantum nature of the molecular arrangement that is the key issue. Many people are used to thinking of drugs primarily as chemicals and not at all in the same sense as food, despite the fact that the food plants themselves are a veritable mine of chemicals of equal significance as vitamins and anti-cancer or anti-oxidant activity, which promote future health and long life.