地质学的进步因用想象的原因代替真实的原因而大大受阻。

"There is always one moment in childhood when the door opens and lets the future in."

自由不仅仅是随心所欲的机会；也不仅仅是在既定选项之间选择的机会。自由首先是制定可用选择的机会，对它们进行辩论——然后，是选择的机会。

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

生存的绵延不是一个长度的问题，而是一个深度和密度的问题。