Every technological breakthrough is a challenge to the limits.
如果你收养了一只饥饿可怜的狗，并且让它舒适顺利，它将不会咬你，这便是一个人与一只狗之间最主要的差别。
Every mathematical problem has a solution, but not every solution is immediately apparent.
最成功的社会是那些允许最大程度个人自由和创造力的社会。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
No arts； no letters； no society； and which is worst of all， continual fear and danger of violent death； and the life of man， solitary， poor， nasty， brutish， and short.