When the Tao prevails in the world, they send back their swift
horses to (draw) the dung-carts. When the Tao is disregarded in the
world, the war-horses breed in the border lands.
There is no guilt greater than to sanction ambition; no calamity
greater than to be discontented with one's lot; no fault greater than
the wish to be getting. Therefore the sufficiency of contentment is
an enduring and unchanging sufficiency.
Tao Te Ching, Chapter 46