未来不是固定的；它是我们可以用知识和行动塑造的东西。

Those of us who have been fortunate have a duty to give back.Whether one gives a lot as one goes along as I do, or a little and then a lot (when one dies) as Warren does, is a matter of personal preference.

I don't think about limitations. I just think about possibilities.

"The heart has its own geography, its own weather."

儿童是人类的创造者。

银河系的黑洞是我们研究极端引力的最近实验室。

数学是关于概念之间关系的科学，与这些概念的内容无关。