People don't buy what you do; they buy why you do it.

A real decision is measured by the fact that you’ve taken a new action. If there’s no action, you haven’t truly decided.

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

关于课程的斗争最终是关于我们希望拥有何种社会的斗争。

I've always been fascinated by the idea of transformation, both physically and emotionally.

我热爱我所做的事，当你热爱你所做的事时，你一生中就不必工作一天。