自由是一种当你看着它时会变化的东西，就像森林近距离看时树木茂密，但从外面，从空旷的草地上看，你看到它的真正界限。自由与锁链或你的笼子有多宽无关。
Freedom was a thing that shifted as you looked at it, the way a forest is dense with trees up close but from outside, from the empty meadow, you see its true limits. Being free had nothing to do with chains or how wide your cage was.
应对一个不自由的世界的唯一方法，就是变得如此绝对自由，以至于你的存在本身就是一种反抗。
天子认为对的未必对，天子认为错的未必错。
The P versus NP problem is one of the most important problems in computer science.