一个设计良好的系统应该易于使用、易于理解和易于修改。
A well-designed system should be easy to use, easy to understand, and easy to modify.
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 worst of all deceptions is self-deception.
Psychological truth is what stands the test of life.