永远不要让成功冲昏头脑,也不要让失败打击你的信心。
You are not the opinion of somebody who doesn’t know you or care about you.
值得畏惧的竞争对手是那些从不关注你,而是一直在改进自己业务的人。
As Will Rogers would have said, "There is no such thing as a free variable."