我这一代人最伟大的发现是，一个人可以通过改变态度来改变他的生活。
The greatest discovery of my generation is that a human being can alter his life by altering his attitudes.
"The best way to lead is to serve."
反对森林砍伐的斗争是为人类的未来而战。
你能给别人的最伟大的礼物就是你的时间和关注。