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数学是给不同事物赋予相同名称的艺术。
Mathematics is the art of giving the same name to different things.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
When people are faced with a problem, they often think in terms of past experiences rather than looking at the actual structure of the problem.
客户满意度始于理解他们未说出口的需求并超越他们的期望。
 “每逢你想要批评任何人的时候”,他对我说,“你就记住,这个世界上所有的人,并不是个个都有过你拥有的那些优越条件。”