The less virtue， the more wealth there is； the less wealth， the more virtue.

我从镜中人开始。我要求他改变他的方式。

Every problem in mathematics has a solution; you just have to find the right path.

Make it simple. Make it memorable. Make it inviting to look at. Make it fun to read.

不管战略多美妙,偶尔看看结果如何很重要。

数学不仅仅是关于数字、方程、计算或算法，而是关于理解。