The most important political development of the last half century has been the spread of liberal democracy around the world.
The pursuit of mathematical knowledge is a never-ending adventure.
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.
法律是社会生活条件的最广泛意义上的总和，由国家权力通过外部强制手段保障。
Patience and perseverance are the keys to scientific discovery.