当你怀疑自己的力量时，你就把力量给了你的怀疑。

摆脱诱惑的唯一方法就是屈服于它。

The mathematician's patterns, like the painter's or the poet's, must be beautiful; the ideas, like the colors or the words, must fit together in a harmonious way.

The one element which is of first importance in scientific management is the task idea.