I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.

The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.

I try to write books that are both entertaining and thought-provoking.

The most profound truths are often the ones we avoid.

不要借贷消费，唯一值得借贷只有一种情况，购买房产这种交换价值极有可能增加的东西。大多数东西的交换价值从你购买的那一刻就会开始减少或消失，不要因债致贫。

Adversity is the first path to truth.

如果服务得好，临时的东西可以变成永久的。