A law of nature， lex naturalis， is a precept or general rule found out by reason， by which a man is forbidden to do that which is destructive of his life or takes away the means of preserving the same.

The present state of the system of nature is evidently a consequence of what it was in the preceding moment, and if we conceive of an intelligence which at a given instant comprehends all the relations of the entities of this universe, it could state the respective positions, motions, and general effects of all these entities at any time in the past or future.

只有热爱自由的人才能拥有自由，其余都是奴隶。

生活不是等待暴风雨过去，而是学会在雨中跳舞。

Science without ethics is like a ship without a compass.

作家的职责是扰乱世界的睡眠。

必须有宽容雅量方可有高尚的品德；必须有忍耐之心性，事情才能成功。