The past is always present, whether we acknowledge it or not.

Don't just fight in the North or the South. Always imagine every battle in your mind, where everyone is both your enemy and your friend, and all possible events happen simultaneously. That way, nothing will take you by surprise, and everything that happens will be something you've already imagined.

如果你不愿意学习，没人能帮你。如果你决心学习，没人能阻止你。

解释：有的东西外表华丽而实质不好，有的东西实质很好而外表并不华丽。

做儿女的使用不正当之道谋求私利，家庭必定混乱，做臣子的使用不正当之义扬个人私名，国家必定危险。国家和家庭一样，会毁于不团结。

实验物理学在决定量子理论的竞争解释方面有最终发言权。