学习数学的最好方法就是做数学。

"The best decisions are often made by a group of people who are not afraid to challenge each other's ideas."

没有艺术；没有文学；没有社会；最糟糕的是，持续的恐惧和暴死的危险；人的生活孤独、贫困、卑污、残忍而短寿。

The beauty of physics lies in its ability to explain the complex with simple laws.