Innovation without execution is just imagination.

数学思想的真正考验是它能否激发更多的问题。

Fear is the foundation of most governments.

It really matters whether people are working on generating clean energy or improving transportation or making the Internet work better and all those things. And small groups of people can have a really huge impact.

每个故事都是一次旅程，而每次旅程都会改变旅行者。