"We are all the sum of our memories, and yet we remember so little."

"The past is a shadow that follows us, no matter how fast we run."

历史不仅仅是关于过去；它是关于过去如何塑造现在。

快乐不是现成的东西。它来自你自己的行动。

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.