数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
思想的存在是为了服务行动,而不仅仅是反映现实。
The greatest poverty is not to live in a physical desert, but to live as an exile in one's own heart.
解释:先前所使用的,现在或许要抛弃。现在要抛弃的,将来或许会用到。
我们唯一恐惧的,就是恐惧本身。