Mathematics is a conversation between the past and the future.

在荒野中，你学会欣赏小事。它们往往会产生最大的影响。

历史不是机械的，因为人们有自由去改变它。

进步的艺术是在变革中保持秩序，在秩序中保持变革。

The night is full of whispers if you know how to listen.

What I’ve achieved in tennis is great, but who I am as a person is more important.

"I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do."

At an early age I learned that people make mistakes, and you have to decide if their mistakes are bigger than your love for them.