Here is installment number four from the book by Donald Keough, who published the Ten Commandments for Business Failure.
#4 Assume Infallibility. Never admit a problem, find a way to blame it on someone else. Customers are often the best culprit. If you do not listen to your customers or your employees on a face-to-face basis you are taking a posture of infallibility. If your information is all second hand, you are at least one person behind. One secret of success is first hand information, which sometimes may point to you being the problem.