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"A good walker leaves no trail.* A good speaker leaves no grounds for blame.** A good counter needs no calculator.*3* A well-closed door needs no bolt and still cannot be opened. A well-tied knot needs no binding and still cannot be untied.*4* Therefore the Sage is always able to save his people and there is no one forsaken.*5* He is able to save all things and there is nothing wasted. This is called inherited enlightenment. Therefore the good man is the teacher of the bad.*6* And the bad man is the material for the good. He who fails to value the teacher and cherish the material,*7* Is utterly lost in spite of his knowledge.*8* This is called crucial subtlety.*9*"