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The Material that can be spoken is not the eternal Material
The name that can be named is not the eternal name
The nameless is the origin of solid phases
The named is the mother of myriad things
Thus, constantly without desire, one observes its essence
Constantly with desire, one observes its manifestations
These two emerge together but differ in name
The unity is said to be the mystery
Mystery of mysteries, the door to all wonders
-- with apologies to Lao Tzu