In computational complexity, we are not just dealing with the limits of what we can compute, but also with the limits of what we can prove.

每一个故事都是一次进入未知的旅程。

The world is full of stories, and from time to time, they permit themselves to be told.

释义：世间繁杂的事情看之不尽，天下的书籍读之不尽，世界的道理参悟不尽。

We are all searching for something, even if we don't know what it is.