勇气是所有美德中最重要的,因为没有勇气,你就无法始终如一地实践其他美德。
In a world of fugitives, the person taking the opposite direction will appear to be running away.
数学中最深刻的思想往往源于最简单的观察。
I believe that if you show people the problems and you show them the solutions they will be moved to act.
你必须愿意失败才能成功。