In business, if you're not failing occasionally, you're not trying hard enough.

The interplay between local and global phenomena is a recurring theme in number theory.

"The magic of reading is that it allows us to live a thousand lives."

不用圆规和曲尺，就不能画出方形和圆形。比喻做事要遵循一定的法则。

没有战略的公司什么都会试一试。