生活就像一架钢琴,白键代表快乐,黑键代表悲伤。但在人生的旅途中,请记住黑键也能创造音乐。
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。 
The difference between stupid and intelligent people—and this is true whether or not they are well-educated—is that intelligent people can handle subtlety.