有时最深刻的数学来自于玩弄简单的想法，直到它们展现出隐藏的复杂性。

"We are all prisoners of our own minds, but some of us have built stronger cages than others."

What is a hero without love for mankind?

The real problem is not whether machines think but whether men do.

好奇心是科学的驱动力。

如果你停下来听一个音乐家或街头艺人表演超过一分钟，你就欠他们一美元。