任何足够先进的技术都与魔法无异。

数学是一项协作的努力。没有人可以单独完成。

I know how much work it takes to get to the top, but even more to stay there.

原文英文：The most merciful thing in the world， I think， is the inability of the human mind to correlate all its contents. We live on a placid island of ignorance in the midst of black seas of infinity， and it was not meant that we should voyage far.

如果你感觉自己在走过地狱。走着别停。