The peculiar evil of silencing the expression of an opinion is that it is robbing the human race； posterity as well as the existing generation； those who dissent from the opinion， still more than those who hold it.
压制意见表达的特殊罪恶在于它是在剥夺人类，无论是后代还是现存的这一代；那些与这一意见不同的人，比那些持有这一意见的人更多。
书籍是飞机，是火车，是道路。它们是目的地，也是旅程。它们是家。
出自汉·桓宽《盐铁论·地广》。释义：不因为是自己的亲近就给以重赏；也不因为与自己疏远就忘掉给人恩惠。
Government, even in its best state, is but a necessary evil; in its worst state, an intolerable one.
诚信是商业中最重要货币。一旦失去它，你就失去了一切。
I think the most important thing in life is to be honest with yourself.
电子特性可以受到拓扑保护的认识彻底改变了我们对固态物理学的理解。