理解经济周期的关键在于理解冲击经济的本质。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的:它是关于理解的。
The only way to understand another person's reality is to experience it yourself.
The best decisions are often made with a combination of data and intuition.
贫困和无知可能逐渐消失的希望,很大程度上源于十九世纪工人阶级的稳步进步。