数学的美在于它允许我们抽象出现实世界的复杂性，专注于基本原则。
We are lonesome animals. We spend all our life trying to be less lonesome. One of our ancient methods is to tell a story begging the listener to say — and to feel — 'Yes, that's the way it is, or at least that's the way I feel it.'
你男朋友那么紧张是因为我。
"In the middle of difficulty lies opportunity."