I don't run to add days to my life, I run to add life to my days.

做出伟大工作的唯一方法就是热爱你所做的事。

The reality is: sometimes you lose. And you’re never too good to lose. You’re never too big to lose. You’re never too smart to lose. It happens.

反馈的研究就是自我调节系统的研究。

数学的进步是通过它能解决的问题数量来衡量的。