數(shù)學(xué)家研究純數(shù)學(xué)不是因為它有用；他研究它是因為他喜歡它，他喜歡它是因為它美麗。
My mother was an atheist. She used to say that there was good news and bad news about hell. The good news is, hell is just the product of a morbid human imagination. The bad news is, whatever humans can imagine, they can usually create.
有時候你必須做你必須做的事情才能生存。
Sustainability is not an option; it's a responsibility we owe to future generations.