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.

我需要一杯酒，我需要很多人寿保险，我需要一个假期，我需要一个乡下的家。我有的是一件外套，一顶帽子和一把枪。

To be brave is to love someone unconditionally, without expecting anything in return.

We are all the heroes of our own stories.