The despotism of custom is everywhere the standing hindrance to human advancement.

我们利用现有的东西，因为它们有价值

The land gives us everything; we must give something back.

To love someone is to know how to lose them.

至今一切社会的历史都是阶级斗争的历史，即剥削阶级和被剥削阶级之间、统治阶级和被压迫阶级之间斗争的历史。

森林是地球的肺，我们必须给予它们应有的关怀。