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A well-designed system should be easy to use, easy to understand, and easy to modify.
I think that the role of the mathematician is to discover these patterns and to explain them.
出自《晓窗》。少年的时候听见鸡鸣的叫声正在熟睡,老年的时候听见鸡鸣就起床了。千古以来万代的人们,都消磨在几声鸡鸣里了。
"Every saint has a past, and every sinner has a future."