你知道,在中世纪的英国,但你遇见一个非常穷苦的人,你会认为他“不走运”,直接地说,那些不被幸运之神眷顾的人。
Psychological theories must pass the test of practical experience.
I'm not a businessman, I'm a business, man!
The only way to keep the small folk loyal is to make sure they fear you more than they fear your enemies. 
当数据与经验结合时,才能做出最佳决策。