世间万物，唯有变化才是永恒不变的法则。
The fact that there is nothing permanent except change is a permanent theme in nature.
In the world of physics, we often find that the simplest questions are the hardest to answer.
凡是圣人制造的这些东西，无一不是有益于实用才去做的，所以使用财物不浪费，民众能够不劳苦，他兴起的利益太多了。
我去往我所爱和爱我的地方。
世界不是一个愿望实现的工厂。
To write is to live, to live is to write.