我们都被过去所困扰，过去总是存在的。
"We are all haunted by the past, and the past is always present."
The path to clean energy begins with making current practices cleaner.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
天地没有偏爱，对待万物像对待草扎的狗一样；圣人也没有偏爱，对待百姓也像对待草扎的狗一样。
开玩笑是件严肃的事情。