数学中最重要的是理解概念，而不仅仅是记忆公式。
The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
我们还有很长的路要走，但我们正朝着正确的方向前进。
On pricing: "There are two kinds of companies， those that work to try to charge more and those that work to charge less. We will be the second."
The most dangerous strategy is to jump a chasm in two leaps.
理解经济波动的关键在于技术冲击与家庭和企业决策之间的相互作用。