我总是相信，如果你陷入困境，也许事情并不顺利，你会变得更强大。

一个好的旅行者不知道他要去哪里。

A proof tells us where to concentrate our doubts.

She's simply too strange. We can't relate to her, she speaks in a funny way, she comes from an odd place. So we can't relate to her, and when you can't relate to somebody, you don't envy them. The closer two people are -- in age, in background, in the process of identification -- the more there's a danger of envy, which is incidentally why none of you should ever go to a school reunion, because there is no stronger reference point than people one was at school with.

科学的每一个伟大进步都源于想象力的新大胆。