Freedom is not a gift, but a right that must be fought for.

自由的价值只有失去时才真正懂得。

生活是一段旅程，如果你爱上了这段旅程，你将永远爱着它。

Every mental state exists for a purpose; to understand it, we must ask what function it serves in the broader system of behavior.

在需要技巧的地方，武力没有用武之地。