生活中最大的荣耀不在于从不跌倒，而在于每次跌倒后都能站起来。

Courage is not the absence of fear, but rather the judgment that something else is more important than fear.

有时候你无法独自完成。

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.

必须尊重过去，但不能复制过去。