科学的进步在于每一步发现一种新的秩序，这种秩序将长期以来看似不同的事物统一起来。

"Illustrations should whisper secrets to the reader, not shout the obvious."

The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.

国君若真的希望人民多而不希望人民减少的话,如果要蓄养姬妾,就不能不节制。

预测未来的最好方法就是创造未来。