Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法:它是关于理解的。
Insight is the sudden comprehension of the relations among the parts of a problem.
Hope is a scarce resource in poor communities.
做出伟大工作的唯一方法就是热爱你所做的事。