History is not just the story of bad people doing bad things. It's also the story of good people doing nothing.

Chemistry is the science of matter, but I prefer to see it as the science of change.

When I look at the world I'm pessimistic, but when I look at people I am optimistic.

樵夫的斧头向树要柄，树便给了它。

我不需要理由去变得伟大。