Terence McKenna (1987, 12 Sep) Nature is the Center of the Mandala.
Here is the Bard McKenna holding forth on the importance of keeping Nature as a focus in our lives. And as always, he has many provocative ideas such as, "Psychedelics are illegal not because a loving government is concerned that you may jump out of a third story window. Psychedelics are illegal because they dissolve opinion structures and culturally laid down models of behavior and information processing. They open you up to the possibility that everything you know is wrong."