人类最古老而强烈的情绪，便是恐惧；而最古老最强烈的恐惧，便是对未知的恐惧。

在你的生活中，有几个地方，或者可能只有一个地方，发生了某件事，然后还有其他所有地方。

The study of automata and formal languages is fundamental to understanding the limits of computation.

I keep thinking about this river somewhere, with the water moving really fast. And these two people in the water, trying to hold onto each other, holding on as hard as they can, but in the end it’s just too much. The current’s too strong. They’ve got to let go, drift apart.

天道没有偏爱，但常常帮助善良的人。