So sometimes things are ahead and sometimes they are behind; Sometimes breathing is hard, sometimes it comes easily; Sometimes there is strength and sometimes weakness; Sometimes one is up and sometimes down. Therefore the sage avoids extremes, excesses, and complacency.
The Tao can't be perceived. Smaller than an electron, it contains uncountable galaxies. If powerful men and women could remain centered in the Tao, all things would be in harmony. The world would become a paradise. All people would be at peace, and the law would be written in their hearts. When you have names and forms, know that they are provisional. When you have institutions, know where their functions should end. Knowing when to stop, you can avoid any danger. All things end in the Tao as rivers flow into the sea.
Weapons are not proper instruments for gentle people; they use them only when they have no other choice. Peace and quiet are what they value. They do not glory in victory.
Thirty spokes meet in the hub. Where a wheel isn't is where it's useful. Hollowed out, clay makes a pot. Where the pots not is where it's useful. Cut doors and windows to make a room. Where the room isn't, there's room for you. So the profit in what is, is in the use of what isn't.