一鼓作气，再而衰，三而竭。
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。
People are mostly shaped by their genes and their environment, but within those constraints, they have some freedom to choose their own path.
The only way to tell the truth is to speak with authority, and the only way to speak with authority is to claim the right to tell the truth.