3.当我看到浪费一杯水的人时，我就会想到地球上那些连水都喝不上的人。

自然是最好的向导，追随她的人必定不会犯错。

The most successful states in the future will be those that combine the rule of law and democratic accountability with effective governance.

Boundaries define us. They define what is me and what is not me. A boundary shows me where I end and someone else begins, leading me to a sense of ownership.

The arithmetic of algebraic varieties is a testament to the power of abstract thought.