自由从来不是被压迫者自愿给予的，必须由被压迫者争取。

The best scientists are those who remain humble in the face of the unknown.

只有尊重自然，才能获得长久的回报。

Heredity is nothing but stored environment.

The mind is not a machine to be understood, but a living process to be experienced.

解释：第一次击鼓能振作士兵们的勇气，第二次击鼓可以使士兵们的勇气低落，第三次击鼓士兵们的勇气就消失了。