"The most dangerous prisons are those we build for ourselves."

History is a nightmare from which I am trying to awake.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

To understand chemistry at its most fundamental level, we must look at the dance of electrons in molecules.

解释：看到乱子出现，若不警惕，损失就会更多；如果想掩饰自己的过错，只会使过错更加明显地表露出来。

最大的风险是不冒险。