当领导者学习时，他们比教学时更强大的榜样。
Leaders are more powerful role models when they learn than when they teach.
人类的自由在其选择中被限制。
"Experience is simply the name we give our mistakes."
释义：从天下的角度看，应遵循天下的公理，天下不是某一姓的私有财产。