在量子力学中，观察者不是客观的，而是系统的一部分。

I have to be alone very often. I'd be quite happy if I spent from Saturday night until Monday morning alone in my apartment. That's how I refuel.

Mathematics is a living subject, constantly evolving with new ideas and discoveries.

对付一个不自由的世界，唯一的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。