"History is not a linear path; it spirals, trapping us in its cycles until we confront its ghosts."

We are all strangers, even to ourselves.

所以君子努力做事就会日渐强大，安于嗜欲就日渐苟且，恭敬庄重就日益繁盛。 

数学的进步是通过概括实现的。