Tao Te Ching Chapter 46

When the world lives in accord with Tao,

Racing horses are turned back to haul refuse carts.

When the world lives not in accord with Tao,

Cavalry abounds in the countryside.

 

There is no greater curse than the lack of contentment.

No greater sin than the desire for possession.

Therefore he who is contented with contentment

shall be always content.

Tao Te Ching