The most hateful thing for a man is to have knowledge of everything but power over nothing.

领导力不是发号施令，而是激励他人成就伟大。

"The only thing necessary for the triumph of evil is for good men to do nothing."

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。