几何不仅仅是关于形状；它是关于理解我们生活的空间及其内部的关系。

宁可放过十个有罪之人，也不冤枉一个无辜者。

Fools ignore complexity. Pragmatists suffer it. Some can avoid it. Geniuses remove it.

The best way to untangle a knotty tangle is not to “untie” the knots， but to keep pulling the loops apart wider and wider. Just make the mess as big， loose and open as possible. As you open up the knots they will unravel themselves. Works on cords， strings， hoses， yarns， or electronic cables.

我认为数学家的作用是发现这些模式并解释它们。

Security and privacy are fundamental to the trust that users place in the Internet.

We don't inherit the earth from our ancestors; we borrow it from our children. This principle guides every step we take.