All men are immortal, but those who are not educated are immortal in a lower and less enviable sense.
所有人都是不朽的,但那些没有受教育的人是以一种更低级和不令人羡慕的方式不朽。
The only true wisdom is in knowing you know nothing.
解决复杂问题的关键是提出正确的因果问题。
如果你没有敌人,那你就已经死了。