Under heaven all can see is beauty as beauty only because there is ugliness. All can know good as good only because there is evil. Therefore having and not having rise together. Difficult and easy compliment each other. Long and short contrast each other. High and low rest upon each other. Voice and sound harmonize each other. Front and back follow one another. Therefore the sage goes about doing nothing, teaching no-talking. The ten thousand things rise and fall without cease, creating, yet not possesing, working, yet not taking credit. Work is done, then forgotten.Therefore it lasts forever.