代数是人类创造的一种智力工具，用于清晰地表达世界的数量关系。

变化是不可避免的，但成长是可选的。

计算机科学家最重要的技能是解决问题。

The secret to success is to start before you're ready.

The telling of beautiful untrue things, is the proper aim of Art.

Well, the first rule is that you can’t really know anything if you just remember isolated facts and try and bang ’em back. If the facts don’t hang together on a latticework of theory, you don’t have them in a usable form.