An expert is a person who has made all the mistakes that can be made in a very narrow field.

The only way to get through life is to laugh your way through it. You either have to laugh or cry. I prefer to laugh. Crying gives me a headache.

我没时间在意谁不喜欢我，忙着爱那些爱我的人都来不及了。

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。