But he says he felt the greatest satisfaction when a thirteen-year-old painted the word "gun" and then put a big "X" through it.

VOA: special.2009.06.01

So leadership is kind of a big word that you see written probably too often these days, in too many newspaper articles, and it probably comes up in too many Yale classes, and I don't claim to know anything about leadership.

领导力这个大词,最近一直都很火啊,我们经常能在报章中看到它,在耶鲁大学的课堂里也能经常听到,我不敢说对领导力有多么深刻的见解

耶鲁公开课 - 博弈论课程节选