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。
Courage is the most important of all the virtues because without courage, you can't practice any other virtue consistently.
数学的本质不是使简单的事情复杂化,而是使复杂的事情简单化。
Every role is a journey, and every journey teaches you something new.