《道德经》第四十六章
天下有道，却走马以粪。天下无道，戎马生于郊。
祸莫大于不知足﹔咎莫大于欲得。故知足之足，常足矣。
《Tao-Te Ching》Chapter 46
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.
【易解】
国家的运行合于道，连战马都可以还田耕种；国家的运行不合于道，战马只能在战场的恶劣环境生产。祸害莫大于不懂得自我满足，罪过莫大于偏执性的贪求。所以，懂得自我满足的富足，是长久的富足。
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