古之立言者，皆有所为而发也。
古代著书立说的人，都是有所为而发的。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
"Sometimes the greatest act of rebellion is simply to remember."
最好的书是那些让你在读完时与开始时有些不同的书。