道德经英文版（成象第六） ~{ 谷神不死，是谓玄牝。玄牝之门，是谓天地根。绵绵若存，用之~} ~{不勤。~} 6. Experience Experience is a riverbed, Its source hidden, forever rising; Its entrance, the root of the world, Flow courses within it: Draw upon it; it will not run dry.