最無用之事，莫過於以有效的方式把根本不該做的事做好。There is nothing so useless as doing efficiently that which should not be done at all.

最無用之事，莫過於以有效的方式把根本不該做的事做好。

–彼得．杜拉克(Peter Drucker )，管理學之父
There is nothing so useless as doing efficiently that which should not be done at all.