The only way to learn mathematics is to do mathematics.

大脑是一个复杂的系统，我们才刚刚开始理解它是如何工作的。

麋鹿成群结队，虎豹都要躲避它们；飞鸟列队成行，鹰鹫不敢袭击它们；众人聚在一起，圣人不敢冒犯它们。点评：俗话说「众人拾柴火焰高」众人合力做一件事情，就会显现力量。

解析：菩提比喻智慧，明镜比喻清净心。本来清净，又哪里会染上什么尘埃？

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

The other thing about modern society and why it causes this anxiety, is that we have nothing at its center that is non-human. We are the first society to be living in a world where we don't worship anything other than ourselves. We think very highly of ourselves, and so we should; we've put people on the Moon, done all sorts of extraordinary things. And so we tend to worship ourselves.