A true mathematician is always a student, always learning.

The sidelines are not where you want to live your life. The world needs you in the arena.

"I like to tell stories that are a little bit off-center, a little bit strange."

I don’t believe in luck. I believe in hard work.

"Die Wahrheit beginnt zu zweit."

无限小在自然中的作用是无限大的。

The more you give, the more you receive in life.

评论人物，应该充分肯定他的长处，宽容地谅解他的短处；办理事务，应该首先弄清它的害处，然后再衡量它的利处。