心理学唯一有效的数据是可观察的行为。

逻辑学研究不仅仅是关于正确推理，而是关于思想的解放。

"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."

The problem with words is that you never know whose mouths they have been in.