When you think it's the most difficult, it's actually the closest you are to success.

学会怎么打称人结（又叫“撑人结”，不会越拉越小的结）。而且要摸黑练习、单手练习。在今后的日子里，你根本想不到它有多有用。

最可持续的森林是既能满足人类需求又能屹立不倒的森林。

"The colony is the place where the project of a new humanity is to be tested, where the dream of a world without borders is to be realized, where the dream of a world without races is to be realized, where the dream of a world without nations is to be realized, where the dream of a world without classes is to be realized, where the dream of a world without genders is to be realized, where the dream of a world without religions is to be realized, where the dream of a world without money is to be realized, where the dream of a world without property is to be realized, where the dream of a world without war is to be realized."