生命太珍贵，不能浪费在后悔上。

有时候你必须和你爱的人分开，但这并不会让你爱他们少一点。有时候你会更爱他们。

In mathematics, the journey from question to answer is often more enlightening than the answer itself.

Is there any relief from some of thesepressures that I've been outlining? I think there is. I just want to turn to afew of them. Let's take meritocracy. This idea that everybody deserves to getwhere they get to, I think it's a crazy idea, completely crazy. I will support any politician of Left and Right, with any halfway-decent meritocratic idea; I am a meritocrat in that sense. But I think it's insane to believe that we will ever make a society that is genuinely meritocratic; it's an impossible dream.

人的通病，往往是被局部所蒙蔽，而对全局的道理不明白。