They are not monuments, but footprints. A monument only says, 'At least I got this far,' while a footprint says, 'This is where I was when I moved again.'

伟大的事情都很简单。而且大多数都可以被凝结成一个简单的单词：自由；公正；荣誉；责任；仁慈；希望。

你能给予他人的最伟大的礼物就是你的时间，因为你正在给予他们你生命中永远不会再回来的一部分。

领导力的作用是产生更多的领导者，而不是更多的追随者。

Civilization as it is known today could not have evolved, nor can it survive, without an adequate food supply.

自满是医学进步的敌人。