树种多样性不仅仅是生态学，它是我们地球肺部的风险管理。
一切人类知识都源于经验。
在一个没有上帝的世界里，我们必须创造自己的意义，即使它最终是无意义的。
The beauty of music is that it can mean different things to different people.
You’ve got to have models in your head. And you’ve got to array your experience—both vicarious and direct—on this latticework of models. You may have noticed students who just try to remember and pound back what is remembered. Well, they fail in school and in life. You’ve got to hang experience on a latticework of models in your mind.