It’s not the world that’s cruel. It’s the people in it.

先验与后验的区别是认识论的，而非形而上学的。

你的时间有限，所以不要浪费在过别人的生活上。

The concept of law is not a concept of a thing, but of a complex social practice.

Simplicity is not the absence of complexity, but the resolution of it.

To love is to risk, but it is a risk worth taking.

数学的本质在于它的自由。