On reflection I think he had his wisdom in two sources: First, his own life experience and rational thinking based on his experience. He liked to ponder over his life by reading his book.

揣度一下，感到他的这种睿智，缘于两种途径：一是他本人的人生阅历，及建立在这个基础之上的理性思考，通过读他的书，知道他是个喜欢“琢磨“生活的人。

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Analytic style: Analytic style is a decision making style characterized by a high tolerance for ambiguity and a rational way of thinking.

分析型风格：分析型风格是具有较高模糊承受力的人运用理性的思维方法的一种决策制定风格。

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Maths is not only a knowledge system but also a rational thinking and argument system. It is a systematism theory knowledge summation by height abstract and strict logic ratiocination.

数学既是一个知识体系，又是一个理性的思辩体系，它是经过高度抽象和严格的逻辑推理形成的系统化理论知识总和。

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