你不必伟大才能开始，但你必须开始才能伟大。

The paper industry has a responsibility to lead the way in environmental stewardship.

As a woman I have no country. As a woman I want no country. As a woman my country is the whole world.

Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.

最难的是理解已经知道的东西。