Your most unhappy customers are your greatest source of learning.

"To be useful was the best thing the old men ever hoped for themselves, and to be aimless was their worst fear."

作家必须是一个愿意冒险的人。

解释：把周天子控制在手里，用天子名义号令天下，天下各诸侯没有一个敢不听从，王霸之业，就此建成。

【释义】：人在幼年时精神专注，成年后心思分散，教育要趁早，别错过时机。  

物理学家必须有一种信念，即自然之书是用一种他可以学会阅读的语言写成的。

Time is dead as long as it is being clicked off by little wheels; only when the clock stops does time come to life.