数学中最深刻的洞见往往来自意想不到的类比。

My words in her mind: cold polished stones sinking through a quagmire.

There are two kinds of companies， those that work to try to charge more and those that work to charge less. We will be the second.

我画人不是因为他们是什么样的人，也不完全不管他们是什么样的人，而是碰巧他们就是那样。

世界上真正的悲剧不是正确与错误之间的冲突，而是两种正确之间的冲突。