子之言恶利也？若无所利而言，是荡口也。
你说的话有什么益处呢？如果没有益处还要说，就是白费口舌。
To be is to do.
Success is not about the money you make, it's about the difference you make in people's lives.
数学的语言是普遍的，超越了文化和语言的障碍。
Your time is limited, so don't waste it living someone else's life.
我不是一个沉溺于过去的人。
"Tennis has given me everything, and I want to give something back."
诗歌将不再为行动打拍子；它将走在前面。
到最后，我们只会后悔没有抓住的机会。