"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
应对一个不自由的世界的唯一方法，就是变得如此绝对自由，以至于你的存在本身就是一种反抗。
We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil.
充分发挥人的天性禀赋，发挥得越多越好：运用天性去穷究物理，极尽智力，通达自然，思惟神妙，造就豁达的胸怀和高洁的品德；尽量压抑人的情感欲望，遏制到越少越好：管束自己去谨慎说话，持重办事，约束自身，心地高洁，还要节衣缩食并减少情欲和嗜好。
The greatest problem of any art is to create a presence.
The dog is a friend of man because it judges him not by his station.