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"The appearance of great virtue Follows only the Tao The Tao, as a thing Seems indistinct, seems unclear So unclear, so indistinct Within it there is image So indistinct, so unclear Within it there is substance So deep, so profound Within it there is essence Its essence is supremely real Within it there is faith From ancient times to the present Its name never departs To observe the source of all things How do I know the nature of the source? With this"