A journey is a person in itself; no two are alike. And all plans, safeguards, policing, and coercion are fruitless. We find after years of struggle that we do not take a trip; a trip takes us.
成功的真正标准是我们对多少人的生活产生了积极影响,而不仅仅是收入数字。
The best way to learn mathematics is to do mathematics.