我喜欢把数学看作一种诗歌。
I like to think of mathematics as a kind of poetry.
The difference between ordinary and extraordinary is that little extra.
快乐不是一件自我存在的东西,它仅是与其他不快乐事情的一个相对比照,这就是快乐的整个情况。
The mind is nature's masterpiece of adaptation.