"Freedom is not something that anybody can be given. Freedom is something people take, and people are as free as they want to be."

数学中最深刻的洞见往往来自意想不到的类比。

A proof is a repeatable experiment in persuasion.

The real reward in science is knowing that your work can save lives.

The theory of probabilities is at bottom nothing but common sense reduced to calculus.

我知道必须让孩子们有所专心，怠慢乃是孩子们最可怕的危险。