"We are literally children of the earth, and removed from her our spirits wither or run to various forms of insanity. Unless we can refresh ourselves at least by intermittent contact with nature, we grow awry."

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There is a thing inherent and natural which existed before heaven and earth. Motionless and fathomless, It stands alone and never changes; It pervades everywhere and never becomes exhausted. It may be regarded as the Mother of the Universe. I do not know its name. If I am forced to give It a name, I call it Tao, and I name it as supreme.

— Laozi