When the Tao reigns in the world, horses are sent back to cultivate crop fields. When the Tao does not reign in the world, mares give young on battlefields.
There is no greater crime than indulging in his unlimited desires. There is no greater misfortune than not knowing how to be self-sufficient. There is no greater calamity than the desire to possess. Those who know how to be self-sufficient are always happy with their lot.