The only freedom which deserves the name is that of pursuing our own good in our own way， so long as we do not attempt to deprive others of theirs， or impede their efforts to obtain it.

The power of causal reasoning is that it allows us to predict the effects of actions we have never taken.

心脏是一个迷宫，爱与痛苦交织其中。

煤炭开采是地球与人类智慧的合作伙伴关系。

即使在最安静的生活中，也有戏剧性。

人类凭借五种感官探索周围的宇宙，并将这一冒险称为科学。