Rule of 7 in research. You can find out anything if you are willing to go seven levels. If the first source you ask doesn’t know， ask them who you should ask next， and so on down the line. If you are willing to go to the 7th source， you’ll almost always get your answer.

The problem of quality management is not what people don't know about it. The problem is what they think they do know.

真正的领导者懂得如何倾听他人的意见并从中学习。