事实上，我不知道如果没有数学我会做什么。

We are moving from an economy based on the production of goods to one based on the production of knowledge.

种树的最佳时间是20年前；第二好的时间就是现在。

Happiness is the very nature of the self; happiness and the self are not different. There is no happiness in any object of the world. We imagine through our ignorance that we derive happiness from objects.