Thethat can be expressed is not the eternal Tao; Thethat can be defined is not the unchanging name. Non-existence is called the antecedent ofand ; Existence is theofthings. From eternal non-existence, therefore, we serenely observe the mysterious beginning of the ; From eternal existence we clearly see the apparent distinctions. These two are the same in source and become different when manifested. This sameness is called profundity.profundity is the gate whence comes the beginning of all parts of the Universe.

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