数学中最深刻的见解往往来自最抽象的理论。
The deepest insights in mathematics often come from the most abstract theories.
【大意】干枯的竹子能生火，但不去钻它就不会燃烧；地下藏有泉源，但不去挖掘就流不出泉水来。
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
Never put off till tomorrow what you can do the day after tomorrow.
When you're different, sometimes you don't see the millions of people who accept you for what you are. All you notice is the person who doesn't.