生命的价值不在于寿命的长短，而在于我们如何利用它。

They just keep trotting back and forth across the bridge thinking there is something better on the other side. If they'd hang head down at the top of the thing and wait quietly, maybe something good would come along. But no—with men it's rush, rush, rush, every minute. I'm glad I'm a sedentary spider.

The most important part of teaching is to teach what it is to know.

I learned early on that the world could be cruel, but I refused to let it break me.

有时候问题很复杂，但答案却很简单。

I don’t like to be told who I am.

Never try to discourage thinking, for you are sure to succeed.