你最不满意的顾客是你最大的学习来源。
君子的学习,听在耳里,记在心里,体现在仪表举止上,表现在一举一动中。
"我不是一个声音,我是一种语言。"
"The most important thing in science is not so much to obtain new facts as to discover new ways of thinking about them."