Clay is fashioned into vessels; it is on their empty hollowness that their use depends. Doors and windows are cut out to make a dwelling, and on the empty space within, its use depends. Thus, while the existence of things may be good, it is the non-existence in them that makes them serviceable.
Fame or integrity: which is more important? Money or happiness: which is more valuable? Success or failure: which is more destructive? If you look to others for fulfillment, you will never truly be fulfilled. If your happiness depends on money, you will never be happy with yourself. Be content with what you have; rejoice in the way things are. When you realize there is nothing lacking, the whole world belongs to you.
Under heaven all can see beauty as beauty only because there is ugliness. All can know good as good only because there is evil. Therefore having and not having arise together. Difficult and easy complement 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.
Once you arrive {at a spontaneous awareness of the Great Oneness}, remember: it isn't necessary to struggle to maintain unity with it. All you have to do is participate in it.