善于行动的人,看不出做事的迹象,就像车走过之后,轮子没有留下辙迹一样。善于言表的人,无瑕谪和漏洞可以指责。善于筹谋的人,不会去用那些用来预测的技术工具。善闭的人,不用关键却闭不可开。善于约束的人,不用绳索却牢不可解。因此,圣人总是善于教育挽救人,所以没有被遗弃的人；总是善于挽救使用万物,所以没有被遗弃的物。这些做法可以说是明智的。 People who are good at action can not see the signs of doing things, just as the wheels do not leave a trail after they have passed. Good words, flawless and loopholes can blame. Good planners, will not use those used to predict the technical tools. Good closed people, not the key but not closed. Good at restraining people, without rope is indefensible. Therefore, the saints are always good at education to save people, so no one abandoned; always good at saving the use of all things, so there is no abandoned object. These practices can be said to be wise.