数学是为不同事物赋予相同名称的艺术。

面对世俗的烦恼要能忍耐，处身纷扰的世事之中要能安闲，心中牵挂的事要能抛开，在功名利禄面前要淡然处之，心怀忿怒之时要能抑制住情绪。

Your time is limited, so don't waste it living someone else's life. Don't be trapped by dogma—which is living with the results of other people's thinking. Don't let the noise of others' opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary.

战略的本质在于选择不做什么。