坚持是数学研究的关键，许多伟大的成果来自于长期的奋斗。

让项目更快完成的最好方法是尽早开始。

恐惧是人类如此强大的情感，以至于当我们允许它控制我们时，它会驱赶我们心中的同情。

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.

People always feel happier when approaching happiness but become anxious when happiness is ongoing.